/* ===== CSS VARIABLES — DARK MODE (default) ===== */

:root {
    --bg-body:        #0B0F14;
    --bg-graph:       #111827;
    --bg-panel:       rgba(17, 24, 39, 0.75);
    --bg-modal:       #111827;
    --bg-input:       #1F2937;
    --bg-math-bar:    rgba(17, 24, 39, 0.85);

    --border-main:    #1F2937;
    --border-modal:   #374151;

    --text-primary:   #F9FAFB;
    --text-muted:     #9CA3AF;
    --text-label:     #6B7280;

    --accent-cyan:    #00D4FF;
    --accent-purple:  #A855F7;
    --accent-yellow:  #FACC15;
    --accent-red:     #FF4D6D;
    --accent-green:   #22C55E;
    --accent-amber:   #F59E0B;

    --shadow-graph:   0 0 20px rgba(0,212,255,0.05), 0 0 60px rgba(0,212,255,0.03);

    --theme-toggle-bg:     rgba(168, 85, 247, 0.15);
    --theme-toggle-color:  #A855F7;
    --theme-toggle-border: #A855F7;
}

[data-theme="light"] {
    --bg-body:        #F0F4F8;
    --bg-graph:       #FFFFFF;
    --bg-panel:       rgba(255, 255, 255, 0.85);
    --bg-modal:       #FFFFFF;
    --bg-input:       #E5EAF0;
    --bg-math-bar:    rgba(240, 244, 248, 0.92);

    --border-main:    #D1D9E0;
    --border-modal:   #C4CDD6;

    --text-primary:   #111827;
    --text-muted:     #4B5563;
    --text-label:     #6B7280;

    --accent-cyan:    #0099BB;
    --accent-purple:  #8B3DCC;
    --accent-yellow:  #D4A017;
    --accent-red:     #E03050;
    --accent-green:   #16A34A;
    --accent-amber:   #D97706;

    --shadow-graph:   0 4px 24px rgba(0,0,0,0.08);

    --theme-toggle-bg:     rgba(139, 61, 204, 0.1);
    --theme-toggle-color:  #8B3DCC;
    --theme-toggle-border: #8B3DCC;
}

/* ===== GLOBAL ===== */

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: Arial, sans-serif;
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

.container { width: 96%; margin: auto; }

/* ===== HEADER ===== */

header { padding: 14px 0; }

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo { display: flex; align-items: center; gap: 12px; }

.logo-text {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -1px;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ===== TOUR BUTTON ===== */

#tourBtn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 18px;
    height: 48px;
    border-radius: 24px;
    background: rgba(0, 212, 255, 0.12);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

#tourBtn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(0,212,255,0.15), transparent);
    transform: translateX(-100%);
    animation: tourBtnShimmer 2.5s infinite;
}

@keyframes tourBtnShimmer {
    100% { transform: translateX(100%); }
}

#tourBtn:hover {
    background: rgba(0, 212, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.35);
}

/* ===== DISCORD & COFFEE BUTTONS ===== */

#discordBtn {
    width: 48px; height: 48px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: rgba(88, 101, 242, 0.15);
    border: 1px solid #5865F2;
    color: #5865F2;
    text-decoration: none;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

#discordBtn:hover {
    background: rgba(88, 101, 242, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(88, 101, 242, 0.45);
}

#coffeeBtn {
    width: 48px; height: 48px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255, 213, 79, 0.15);
    border: 1px solid #FFD54F;
    color: #FFD54F;
    text-decoration: none;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

#coffeeBtn:hover {
    background: rgba(255, 213, 79, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 213, 79, 0.45);
}

/* ===== MAIN ===== */

main { position: relative; }

/* ===== GRAPH ===== */

#graph {
    width: 100%;
    height: calc(100vh - 100px);
    min-height: 600px;
    position: relative;
    background-color: var(--bg-graph);
    border: 1px solid var(--border-main);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-graph);
    transition: background-color 0.3s, border-color 0.3s;
}

#vectorCanvas { width: 100%; height: 100%; display: block; }

/* ===== GRAPH BUTTONS (top-left) ===== */

#graph-buttons {
    position: absolute;
    top: 20px; left: 20px;
    display: flex; flex-direction: column; gap: 10px;
    z-index: 100;
}

#addVectorBtn {
    padding: 12px 20px;
    background: var(--accent-cyan);
    color: #000;
    border: none;
    border-radius: 12px;
    font-weight: bold; font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#addVectorBtn:hover { background: #00b8d9; transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,212,255,0.4); }

#coordInputBtn {
    padding: 12px 20px;
    background: rgba(250,204,21,0.15);
    color: var(--accent-yellow);
    border: 1px solid var(--accent-yellow);
    border-radius: 12px;
    font-weight: bold; font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#coordInputBtn:hover { background: rgba(250,204,21,0.3); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(250,204,21,0.35); }

#deleteMode {
    padding: 12px 20px;
    background: rgba(255,77,109,0.15);
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
    border-radius: 12px;
    font-weight: bold; font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#deleteMode:hover { background: rgba(255,77,109,0.3); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(255,77,109,0.35); }

#resetCamera {
    padding: 12px 20px;
    background: rgba(168,85,247,0.15);
    color: var(--accent-purple);
    border: 1px solid var(--accent-purple);
    border-radius: 12px;
    font-weight: bold; font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#resetCamera:hover { background: rgba(168,85,247,0.3); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(168,85,247,0.35); }

/* ===== VECTOR COUNTER ===== */

#vectorCounter {
    position: absolute;
    top: 20px; left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex; flex-direction: column; align-items: center; gap: 2px;
    background: var(--bg-math-bar);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-main);
    border-radius: 14px;
    padding: 10px 20px;
    min-width: 80px;
    transition: background 0.3s, border-color 0.3s;
}

#vectorCountNum {
    font-family: 'Courier New', monospace;
    font-size: 28px; font-weight: 700;
    color: var(--accent-cyan);
    line-height: 1;
}

#vectorCountNum.bump { animation: counterBump 0.3s cubic-bezier(0.34,1.56,0.64,1); }

@keyframes counterBump {
    0%  { transform: scale(1); }
    50% { transform: scale(1.4); }
    100%{ transform: scale(1); }
}

#vectorCountLabel {
    font-size: 10px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 1.5px;
    color: var(--text-label);
}

/* ===== MATH BUTTONS (bottom center) ===== */

#math-buttons {
    position: absolute;
    bottom: 24px; left: 50%;
    transform: translateX(-50%);
    display: flex; flex-direction: row; gap: 12px;
    z-index: 100;
    background: var(--bg-math-bar);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-main);
    border-radius: 16px;
    padding: 12px 20px;
    transition: background 0.3s, border-color 0.3s;
}

#math-buttons button {
    padding: 10px 18px;
    border-radius: 10px;
    font-weight: bold; font-size: 13px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
}

#showSum   { background: rgba(250,204,21,0.15);  color: var(--accent-yellow); border: 1px solid var(--accent-yellow); }
#showSum:hover   { background: rgba(250,204,21,0.3);  transform: translateY(-3px); box-shadow: 0 6px 20px rgba(250,204,21,0.35); }
#showSub   { background: rgba(255,77,109,0.15);  color: var(--accent-red);    border: 1px solid var(--accent-red); }
#showSub:hover   { background: rgba(255,77,109,0.3);  transform: translateY(-3px); box-shadow: 0 6px 20px rgba(255,77,109,0.35); }
#showDot   { background: rgba(34,197,94,0.15);   color: var(--accent-green);  border: 1px solid var(--accent-green); }
#showDot:hover   { background: rgba(34,197,94,0.3);   transform: translateY(-3px); box-shadow: 0 6px 20px rgba(34,197,94,0.35); }
#showCross { background: rgba(168,85,247,0.15);  color: var(--accent-purple); border: 1px solid var(--accent-purple); }
#showCross:hover { background: rgba(168,85,247,0.3);  transform: translateY(-3px); box-shadow: 0 6px 20px rgba(168,85,247,0.35); }

/* ===== ZOOM CONTROLS (bottom right) ===== */

#zoom-controls {
    position: absolute;
    bottom: 24px; right: 20px;
    display: flex; align-items: center; gap: 8px;
    z-index: 100;
    background: var(--bg-math-bar);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-main);
    border-radius: 14px;
    padding: 8px 14px;
    transition: background 0.3s, border-color 0.3s;
}

#zoom-controls button {
    width: 32px; height: 32px;
    border-radius: 8px;
    font-size: 20px; font-weight: 700;
    cursor: pointer;
    background: rgba(0,212,255,0.12);
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
    display: flex; align-items: center; justify-content: center;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#zoom-controls button:hover { background: rgba(0,212,255,0.28); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,212,255,0.35); }

#zoomLabel {
    font-size: 13px; font-weight: 700;
    color: var(--text-muted);
    min-width: 44px; text-align: center;
    font-family: 'Courier New', monospace;
}

/* ===== THEME TOGGLE ===== */

#themeToggle {
    position: absolute;
    bottom: 24px; left: 20px;
    width: 46px; height: 46px;
    border-radius: 50%; font-size: 20px;
    cursor: pointer; z-index: 100;
    background: var(--theme-toggle-bg);
    color: var(--theme-toggle-color);
    border: 1px solid var(--theme-toggle-border);
    display: flex; align-items: center; justify-content: center;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s, border-color 0.3s;
    backdrop-filter: blur(8px);
}
#themeToggle:hover { transform: translateY(-3px) rotate(20deg); box-shadow: 0 6px 20px rgba(168,85,247,0.4); }

/* ===== INFO PANEL ===== */

#info-panel {
    position: absolute;
    top: 25px; right: 25px;
    z-index: 100;
    width: 230px;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-main);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(16px);
    transition: background-color 0.3s, border-color 0.3s;
}

.panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.panel-header h2 { font-size: 15px; font-weight: 700; color: var(--text-primary); }

#panelVectorTag {
    font-size: 11px; font-weight: 700;
    font-family: 'Courier New', monospace;
    padding: 3px 10px; border-radius: 20px;
    background: rgba(0,212,255,0.15);
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
}

.panel-section { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.panel-row { display: flex; gap: 8px; }

.panel-card {
    flex: 1; border-radius: 10px;
    padding: 10px 10px 8px;
    display: flex; flex-direction: column; gap: 4px;
    background: var(--bg-input);
    border: 1px solid transparent;
    transition: background 0.3s;
}
.panel-card.cyan   { border-color: rgba(0,212,255,0.25); }
.panel-card.yellow { border-color: rgba(250,204,21,0.25); }
.panel-card.green  { border-color: rgba(34,197,94,0.25); }
.panel-card.red    { border-color: rgba(255,77,109,0.25); }

.panel-card-label { font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; }
.panel-card.cyan   .panel-card-label { color: var(--accent-cyan); }
.panel-card.yellow .panel-card-label { color: var(--accent-yellow); }
.panel-card.green  .panel-card-label { color: var(--accent-green); }
.panel-card.red    .panel-card-label { color: var(--accent-red); }

.panel-card-value { font-family: 'Courier New', monospace; font-size: 16px; font-weight: 700; color: var(--text-primary); }

.panel-divider { height: 1px; background: var(--border-main); margin-bottom: 12px; }

.panel-coords { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.panel-coords-label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-label); width: 32px; }
.panel-coords-value { font-family: 'Courier New', monospace; font-size: 13px; color: var(--text-muted); }

/* ===== ERROR TOAST ===== */

#errorToast {
    position: fixed;
    top: 28px; left: 50%;
    transform: translateX(-50%) translateY(-120px);
    z-index: 9999;
    display: flex; align-items: flex-start; gap: 12px;
    background: #1a0a0d;
    border: 1px solid var(--accent-red);
    border-radius: 14px;
    padding: 16px 22px;
    min-width: 300px; max-width: 420px;
    box-shadow: 0 8px 32px rgba(255,77,109,0.3);
    transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1), opacity 0.3s;
    opacity: 0; pointer-events: none;
}

[data-theme="light"] #errorToast { background: #fff0f3; }

#errorToast.show { transform: translateX(-50%) translateY(0); opacity: 1; pointer-events: auto; }
#errorToast.shake { animation: toastShake 0.5s cubic-bezier(0.36,0.07,0.19,0.97); }

@keyframes toastShake {
    0%,100% { transform: translateX(-50%) translateY(0); }
    15%     { transform: translateX(calc(-50% - 10px)) translateY(0); }
    30%     { transform: translateX(calc(-50% + 10px)) translateY(0); }
    45%     { transform: translateX(calc(-50% - 7px)) translateY(0); }
    60%     { transform: translateX(calc(-50% + 7px)) translateY(0); }
    75%     { transform: translateX(calc(-50% - 4px)) translateY(0); }
}

#errorIcon { font-size: 20px; color: var(--accent-red); flex-shrink: 0; margin-top: 2px; }
#errorText { display: flex; flex-direction: column; gap: 4px; }
#errorText strong { color: var(--accent-red); font-size: 14px; font-weight: 700; }
#errorText span { color: #c9a0a8; font-size: 13px; line-height: 1.5; }
[data-theme="light"] #errorText span { color: #8a4a55; }

/* ===== COORDINATE MODAL ===== */

#coordModal {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    z-index: 1000; align-items: center; justify-content: center;
}
#coordModal.active { display: flex; }

#coordBox {
    position: relative;
    background: var(--bg-modal);
    border: 1px solid var(--border-modal);
    border-radius: 16px; padding: 40px 48px; width: 440px;
    text-align: center;
    box-shadow: 0 0 40px rgba(250,204,21,0.15);
    animation: modalPop 0.3s cubic-bezier(0.34,1.56,0.64,1) forwards;
    transition: background 0.3s;
}

#closeCoordModal {
    position: absolute; top: 14px; right: 18px;
    background: none; border: none;
    color: var(--text-label); font-size: 18px; cursor: pointer;
    transition: color 0.2s;
}
#closeCoordModal:hover { color: var(--text-primary); }

#coordTitle { font-family: 'Segoe UI', sans-serif; font-size: 24px; font-weight: 700; margin-bottom: 6px; color: var(--accent-cyan); }
#coordSub { font-size: 13px; color: var(--text-label); margin-bottom: 24px; }

.coord-row { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; margin-bottom: 20px; }
.coord-row select { width: 100%; }

.coord-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 24px; text-align: left; }
.coord-group { display: flex; flex-direction: column; gap: 6px; }

.coord-group input {
    background: var(--bg-input); color: var(--text-primary);
    border: 1px solid var(--border-modal); border-radius: 10px;
    padding: 10px 14px; font-size: 15px;
    font-family: 'Courier New', monospace;
    outline: none; width: 100%;
    transition: border-color 0.2s, background 0.3s;
}
.coord-group input:hover, .coord-group input:focus { border-color: var(--accent-cyan); }

#applyCoordBtn {
    padding: 14px 32px;
    background: rgba(0,212,255,0.15); color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan); border-radius: 12px;
    font-weight: bold; font-size: 15px; cursor: pointer; width: 100%;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#applyCoordBtn:hover { background: rgba(0,212,255,0.3); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,212,255,0.35); }

/* ===== GLOBAL BUTTON ANIMATIONS ===== */

button { transition: transform 0.2s, box-shadow 0.2s; }
button:active { transform: translateY(1px) !important; box-shadow: none !important; }

/* ===== MODAL BASE ===== */

#sumPickerModal, #sumResultModal,
#subPickerModal, #subResultModal,
#dotPickerModal, #dotResultModal,
#crossPickerModal, #crossResultModal {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    z-index: 1000; align-items: center; justify-content: center;
}

#sumPickerModal.active, #sumResultModal.active,
#subPickerModal.active, #subResultModal.active,
#dotPickerModal.active, #dotResultModal.active,
#crossPickerModal.active, #crossResultModal.active { display: flex; }

@keyframes modalPop {
    from { transform: scale(0.85); opacity: 0; }
    to   { transform: scale(1);    opacity: 1; }
}

/* ===== MODAL BOXES ===== */

#sumPickerBox,  #sumResultBox  { position: relative; background: var(--bg-modal); border: 1px solid var(--border-modal); border-radius: 16px; padding: 40px 48px; width: 420px; text-align: center; box-shadow: 0 0 40px rgba(250,204,21,0.15); animation: modalPop 0.3s cubic-bezier(0.34,1.56,0.64,1) forwards; transition: background 0.3s; }
#subPickerBox,  #subResultBox  { position: relative; background: var(--bg-modal); border: 1px solid var(--border-modal); border-radius: 16px; padding: 40px 48px; width: 420px; text-align: center; box-shadow: 0 0 40px rgba(255,77,109,0.15); animation: modalPop 0.3s cubic-bezier(0.34,1.56,0.64,1) forwards; transition: background 0.3s; }
#dotPickerBox,  #dotResultBox  { position: relative; background: var(--bg-modal); border: 1px solid var(--border-modal); border-radius: 16px; padding: 40px 48px; width: 420px; text-align: center; box-shadow: 0 0 40px rgba(34,197,94,0.15); animation: modalPop 0.3s cubic-bezier(0.34,1.56,0.64,1) forwards; transition: background 0.3s; }
#crossPickerBox,#crossResultBox{ position: relative; background: var(--bg-modal); border: 1px solid var(--border-modal); border-radius: 16px; padding: 40px 48px; width: 420px; text-align: center; box-shadow: 0 0 40px rgba(168,85,247,0.15); animation: modalPop 0.3s cubic-bezier(0.34,1.56,0.64,1) forwards; transition: background 0.3s; }

/* ===== MODAL CLOSE BUTTONS ===== */

#closeSumPicker, #closeSumResult, #closeSubPicker, #closeSubResult,
#closeDotPicker, #closeDotResult, #closeCrossPicker, #closeCrossResult {
    position: absolute; top: 14px; right: 18px;
    background: none; border: none; color: var(--text-label);
    font-size: 18px; cursor: pointer; transition: color 0.2s;
}
#closeSumPicker:hover, #closeSumResult:hover, #closeSubPicker:hover, #closeSubResult:hover,
#closeDotPicker:hover, #closeDotResult:hover, #closeCrossPicker:hover, #closeCrossResult:hover { color: var(--text-primary); }

/* ===== MODAL TITLES ===== */

#sumPickerTitle,  #sumResultTitle  { color: var(--accent-yellow); }
#subPickerTitle,  #subResultTitle  { color: var(--accent-red); }
#dotPickerTitle,  #dotResultTitle  { color: var(--accent-green); }
#crossPickerTitle,#crossResultTitle{ color: var(--accent-purple); }

#sumPickerTitle, #sumResultTitle, #subPickerTitle, #subResultTitle,
#dotPickerTitle, #dotResultTitle, #crossPickerTitle, #crossResultTitle {
    font-family: 'Segoe UI', sans-serif; font-size: 26px; font-weight: 700;
    margin: 0 0 6px; letter-spacing: 0.5px;
}

#sumPickerSub, #sumResultSub, #subPickerSub, #subResultSub,
#dotPickerSub, #dotResultSub, #crossPickerSub, #crossResultSub {
    font-family: 'Segoe UI', sans-serif; font-size: 13px;
    color: var(--text-label); margin: 0 0 28px;
}

/* ===== MODAL SELECTORS ===== */

.sub-selectors { display: flex; align-items: center; justify-content: center; gap: 16px; margin-bottom: 28px; }
.sub-select-group { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }

.sub-label { font-family: 'Segoe UI', sans-serif; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--text-label); }

.sub-plus  { font-size: 32px; font-weight: 700; color: var(--accent-yellow); margin-top: 18px; }
.sub-minus { font-size: 32px; font-weight: 700; color: var(--accent-red);    margin-top: 18px; }
.sub-dot   { font-size: 40px; font-weight: 900; color: var(--accent-green);  margin-top: 14px; line-height: 1; }
.sub-cross { font-size: 32px; font-weight: 700; color: var(--accent-purple); margin-top: 18px; }

select {
    background: var(--bg-input); color: var(--text-primary);
    border: 1px solid var(--border-modal); border-radius: 10px;
    padding: 10px 16px; font-size: 15px;
    font-family: 'Courier New', monospace;
    cursor: pointer; outline: none; width: 140px;
    transition: border-color 0.2s, background 0.3s;
}
select:hover, select:focus { border-color: var(--accent-cyan); }

/* ===== CALC BUTTONS ===== */

#calcSumBtn   { padding: 14px 32px; background: rgba(250,204,21,0.15); color: var(--accent-yellow); border: 1px solid var(--accent-yellow); border-radius: 12px; font-weight: bold; font-size: 15px; cursor: pointer; width: 100%; transition: background 0.2s, transform 0.2s, box-shadow 0.2s; }
#calcSumBtn:hover   { background: rgba(250,204,21,0.3); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(250,204,21,0.35); }
#calcSubBtn   { padding: 14px 32px; background: rgba(255,77,109,0.15); color: var(--accent-red);    border: 1px solid var(--accent-red);    border-radius: 12px; font-weight: bold; font-size: 15px; cursor: pointer; width: 100%; transition: background 0.2s, transform 0.2s, box-shadow 0.2s; }
#calcSubBtn:hover   { background: rgba(255,77,109,0.3); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(255,77,109,0.35); }
#calcDotBtn   { padding: 14px 32px; background: rgba(34,197,94,0.15);  color: var(--accent-green);  border: 1px solid var(--accent-green);  border-radius: 12px; font-weight: bold; font-size: 15px; cursor: pointer; width: 100%; transition: background 0.2s, transform 0.2s, box-shadow 0.2s; }
#calcDotBtn:hover   { background: rgba(34,197,94,0.3);  transform: translateY(-3px); box-shadow: 0 6px 20px rgba(34,197,94,0.35); }
#calcCrossBtn { padding: 14px 32px; background: rgba(168,85,247,0.15); color: var(--accent-purple); border: 1px solid var(--accent-purple); border-radius: 12px; font-weight: bold; font-size: 15px; cursor: pointer; width: 100%; transition: background 0.2s, transform 0.2s, box-shadow 0.2s; }
#calcCrossBtn:hover { background: rgba(168,85,247,0.3); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(168,85,247,0.35); }

/* ===== RESULT CARDS ===== */

.sum-row { display: flex; gap: 16px; margin-bottom: 16px; }
.sum-item { flex: 1; background: var(--bg-input); border-radius: 10px; padding: 16px 12px; display: flex; flex-direction: column; gap: 8px; transition: background 0.3s; }
.sum-label { font-family: 'Segoe UI', sans-serif; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--text-label); }
.sum-value { font-family: 'Courier New', monospace; font-size: 22px; font-weight: 700; color: var(--text-primary); }

.dot-interpretation { margin-top: 18px; padding: 12px 16px; background: var(--bg-input); border-radius: 10px; font-family: 'Segoe UI', sans-serif; font-size: 13px; color: var(--text-muted); line-height: 1.6; transition: background 0.3s; }

/* ═══════════════════════════════════════
   TOUR SYSTEM
═══════════════════════════════════════ */

#tourOverlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 8000;
    pointer-events: none;
}

#tourOverlay.active {
    display: block;
    pointer-events: auto;
}

#tourCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

/* ── Tooltip ── */

#tourTooltip {
    position: fixed;
    z-index: 8100;
    width: 360px;
    pointer-events: auto;
    filter: drop-shadow(0 20px 60px rgba(0,0,0,0.7));
    transition: left 0.5s cubic-bezier(0.34,1.2,0.64,1),
                top  0.5s cubic-bezier(0.34,1.2,0.64,1),
                opacity 0.3s;
}

#tourTooltipInner {
    background: #0D1520;
    border: 1px solid rgba(0,212,255,0.4);
    border-radius: 18px;
    padding: 28px 28px 22px;
    position: relative;
    overflow: hidden;
}

[data-theme="light"] #tourTooltipInner {
    background: #FFFFFF;
    border-color: rgba(0,153,187,0.4);
}

/* Glowing top edge */
#tourTooltipInner::before {
    content: '';
    position: absolute;
    top: 0; left: 20%; right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, #00D4FF, transparent);
    opacity: 0.8;
}

/* Subtle background glow */
#tourTooltipInner::after {
    content: '';
    position: absolute;
    top: -40px; left: -40px; right: -40px;
    height: 120px;
    background: radial-gradient(ellipse, rgba(0,212,255,0.06) 0%, transparent 70%);
    pointer-events: none;
}

#tourStepBadge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 700;
    font-family: 'Courier New', monospace;
    color: #00D4FF;
    background: rgba(0,212,255,0.12);
    border: 1px solid rgba(0,212,255,0.3);
    border-radius: 20px;
    padding: 4px 12px;
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

[data-theme="light"] #tourStepBadge { color: #0099BB; background: rgba(0,153,187,0.1); border-color: rgba(0,153,187,0.3); }

#tourTitle {
    font-size: 20px;
    font-weight: 800;
    color: #F9FAFB;
    margin-bottom: 10px;
    line-height: 1.3;
    letter-spacing: -0.3px;
}

[data-theme="light"] #tourTitle { color: #111827; }

#tourDesc {
    font-size: 14px;
    color: #9CA3AF;
    line-height: 1.7;
    margin-bottom: 22px;
}

[data-theme="light"] #tourDesc { color: #4B5563; }

#tourActions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

#tourSkip {
    background: none;
    border: none;
    color: #4B5563;
    font-size: 13px;
    cursor: pointer;
    padding: 0;
    transition: color 0.2s;
    text-decoration: underline;
    text-underline-offset: 3px;
}
#tourSkip:hover { color: #9CA3AF; }

#tourNavBtns { display: flex; gap: 10px; }

#tourPrev {
    padding: 10px 18px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 10px;
    color: #9CA3AF;
    font-size: 13px; font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, transform 0.2s;
}
#tourPrev:hover { background: rgba(255,255,255,0.12); color: #F9FAFB; transform: translateY(-1px); }
[data-theme="light"] #tourPrev { background: rgba(0,0,0,0.05); border-color: rgba(0,0,0,0.12); color: #6B7280; }
[data-theme="light"] #tourPrev:hover { background: rgba(0,0,0,0.1); color: #111827; }

#tourNext {
    padding: 10px 22px;
    background: #00D4FF;
    border: none;
    border-radius: 10px;
    color: #000;
    font-size: 13px; font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#tourNext:hover { background: #00b8d9; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,212,255,0.4); }

/* Dots */
#tourDots {
    display: flex;
    justify-content: center;
    gap: 6px;
}

.tour-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    transition: background 0.3s, width 0.3s;
    cursor: pointer;
}

[data-theme="light"] .tour-dot { background: rgba(0,0,0,0.12); }

.tour-dot.active {
    background: #00D4FF;
    width: 20px;
    border-radius: 3px;
}

[data-theme="light"] .tour-dot.active { background: #0099BB; }

/* ── Spotlight pulse ring ── */
.tour-pulse {
    position: fixed;
    border-radius: 50%;
    border: 2px solid rgba(0,212,255,0.6);
    pointer-events: none;
    z-index: 8050;
    animation: tourPulseRing 1.8s ease-out infinite;
}

@keyframes tourPulseRing {
    0%   { transform: scale(1);   opacity: 0.8; }
    70%  { transform: scale(1.5); opacity: 0; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* ── Animated arrow pointer ── */
#tourArrow {
    position: fixed;
    z-index: 8090;
    pointer-events: none;
    transition: left 0.5s cubic-bezier(0.34,1.2,0.64,1),
                top  0.5s cubic-bezier(0.34,1.2,0.64,1),
                opacity 0.3s, transform 0.5s;
    animation: tourArrowBob 1s ease-in-out infinite;
}

@keyframes tourArrowBob {
    0%,100% { transform: translateY(0)  rotate(var(--arrow-rot,0deg)); }
    50%     { transform: translateY(-6px) rotate(var(--arrow-rot,0deg)); }
}

#tourArrow svg { filter: drop-shadow(0 0 8px rgba(0,212,255,0.8)); }

/* ===== SAVE BUTTON ===== */

#saveBtn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 18px;
    height: 48px;
    border-radius: 24px;
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid var(--accent-green);
    color: var(--accent-green);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

#saveBtn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(34,197,94,0.15), transparent);
    transform: translateX(-100%);
    animation: saveBtnShimmer 2.5s infinite;
}

@keyframes saveBtnShimmer {
    100% { transform: translateX(100%); }
}

#saveBtn:hover {
    background: rgba(34, 197, 94, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.35);
}

/* ===== SAVE MODAL ===== */

#saveModal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

#saveModal.active { display: flex; }

#saveBox {
    position: relative;
    background: var(--bg-modal);
    border: 1px solid var(--accent-green);
    border-radius: 16px;
    padding: 40px 48px;
    width: 480px;
    max-width: 95vw;
    text-align: center;
    box-shadow: 0 0 40px rgba(34,197,94,0.2);
    animation: modalPop 0.3s cubic-bezier(0.34,1.56,0.64,1) forwards;
    transition: background 0.3s;
}

#closeSaveModal {
    position: absolute;
    top: 14px; right: 18px;
    background: none; border: none;
    color: var(--text-label); font-size: 18px;
    cursor: pointer; transition: color 0.2s;
}
#closeSaveModal:hover { color: var(--text-primary); }

#saveTitle {
    font-family: 'Segoe UI', sans-serif;
    font-size: 24px; font-weight: 700;
    margin-bottom: 6px;
    color: var(--accent-green);
}

#saveSub {
    font-size: 13px; color: var(--text-label);
    margin-bottom: 24px;
}

#saveSlotList {
    max-height: 260px;
    overflow-y: auto;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#saveSlotList::-webkit-scrollbar { width: 4px; }
#saveSlotList::-webkit-scrollbar-track { background: transparent; }
#saveSlotList::-webkit-scrollbar-thumb { background: var(--border-modal); border-radius: 4px; }

.save-slot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-input);
    border: 1px solid var(--border-modal);
    border-radius: 10px;
    padding: 12px 16px;
    text-align: left;
    transition: background 0.2s;
}

.save-slot:hover { background: var(--border-modal); }

.save-slot-info { display: flex; flex-direction: column; gap: 3px; }

.save-slot-name {
    font-size: 14px; font-weight: 700;
    color: var(--text-primary);
    font-family: 'Segoe UI', sans-serif;
}

.save-slot-meta {
    font-size: 11px;
    color: var(--text-label);
    font-family: 'Courier New', monospace;
}

.save-slot-btns { display: flex; gap: 8px; flex-shrink: 0; }

.save-load-btn {
    padding: 7px 16px;
    background: rgba(34,197,94,0.15);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
    border-radius: 8px;
    font-size: 12px; font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}
.save-load-btn:hover { background: rgba(34,197,94,0.3); transform: translateY(-1px); }

.save-delete-btn {
    padding: 7px 12px;
    background: rgba(255,77,109,0.12);
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
    border-radius: 8px;
    font-size: 12px; font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}
.save-delete-btn:hover { background: rgba(255,77,109,0.3); transform: translateY(-1px); }

.save-new {
    display: flex;
    gap: 10px;
    align-items: center;
}

.save-new input {
    flex: 1;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-modal);
    border-radius: 10px;
    padding: 11px 14px;
    font-size: 14px;
    font-family: 'Segoe UI', sans-serif;
    outline: none;
    transition: border-color 0.2s;
}
.save-new input:focus { border-color: var(--accent-green); }
.save-new input::placeholder { color: var(--text-label); }

#confirmSaveBtn {
    padding: 11px 20px;
    background: rgba(34,197,94,0.15);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
    border-radius: 10px;
    font-weight: 700; font-size: 14px;
    cursor: pointer; white-space: nowrap;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
#confirmSaveBtn:hover { background: rgba(34,197,94,0.3); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(34,197,94,0.35); }