:root {
    --jarvis-bg: #07080d;
    --jarvis-bg-2: #0d1019;
    --jarvis-surface: rgba(13, 16, 25, .82);
    --jarvis-surface-2: #121624;
    --jarvis-text: #eef2ff;
    --jarvis-muted: #9299b3;
    --jarvis-accent: #8b5cf6;
    --jarvis-accent-2: #6366f1;
    --jarvis-glow: rgba(139, 92, 246, .28);
    --jarvis-border: rgba(139, 92, 246, .30);
    --jarvis-input: rgba(5, 10, 20, .72);
    --jarvis-success: #86efac;
}

html[data-theme="midnight"] {
    --jarvis-bg: #07080d;
    --jarvis-bg-2: #0d1019;
    --jarvis-surface: rgba(13, 16, 25, .82);
    --jarvis-surface-2: #121624;
    --jarvis-text: #eef2ff;
    --jarvis-muted: #9299b3;
    --jarvis-accent: #8b5cf6;
    --jarvis-accent-2: #6366f1;
    --jarvis-glow: rgba(139, 92, 246, .28);
    --jarvis-border: rgba(139, 92, 246, .30);
    --jarvis-input: rgba(5, 10, 20, .72);
    --jarvis-success: #86efac;
}

html[data-theme="sunset"] {
    --jarvis-bg: #071016;
    --jarvis-bg-2: #0b1822;
    --jarvis-surface: rgba(11, 24, 34, .84);
    --jarvis-surface-2: #10232e;
    --jarvis-text: #edfaff;
    --jarvis-muted: #91aab5;
    --jarvis-accent: #35b8e8;
    --jarvis-accent-2: #f0a66a;
    --jarvis-glow: rgba(53, 184, 232, .25);
    --jarvis-border: rgba(53, 184, 232, .30);
    --jarvis-input: rgba(4, 14, 21, .76);
    --jarvis-success: #86efac;
}

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

html,
body {
    background-color: var(--jarvis-bg) !important;
    color: var(--jarvis-text) !important;
}

body {
    transition:
        background-color .55s ease,
        color .55s ease !important;

    background:
        radial-gradient(
            circle at 10% 10%,
            color-mix(in srgb, var(--jarvis-accent) 25%, transparent),
            transparent 35%
        ),
        radial-gradient(
            circle at 90% 90%,
            color-mix(in srgb, var(--jarvis-accent-2) 20%, transparent),
            transparent 35%
        ),
        var(--jarvis-bg) !important;
}

body,
body * {
    transition:
        background-color .55s ease,
        color .55s ease,
        border-color .55s ease,
        box-shadow .55s ease,
        text-shadow .55s ease,
        filter .55s ease !important;
}

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

.header,
.main,
.footer,
.form-card,
.snake-wait,
.jarvis-message {
    color: var(--jarvis-text);
}

.form-card {
    background: var(--jarvis-surface) !important;
    border-color: var(--jarvis-border) !important;
    box-shadow:
        0 30px 80px rgba(0, 0, 0, .45),
        0 0 80px var(--jarvis-glow) !important;
}

.hero-content > p,
.form-description,
.form-footer,
.footer,
.snake-header p,
.snake-hint,
.jarvis-small {
    color: var(--jarvis-muted) !important;
}

.nav a {
    color: var(--jarvis-muted) !important;
}

.nav a:hover,
.nav a.active {
    color: var(--jarvis-text) !important;
}

.badge {
    color: var(--jarvis-accent) !important;
    background: color-mix(in srgb, var(--jarvis-accent) 10%, transparent) !important;
    border-color: var(--jarvis-border) !important;
}

.hero h1 span {
    background: linear-gradient(
        135deg,
        var(--jarvis-accent),
        var(--jarvis-accent-2)
    ) !important;

    -webkit-background-clip: text !important;
    background-clip: text !important;
    color: transparent !important;
}

/* ===== INPUTS ===== */

.input-group label {
    color: var(--jarvis-muted) !important;
}

input,
select,
textarea {
    background: var(--jarvis-input) !important;
    color: var(--jarvis-text) !important;
    border-color: var(--jarvis-border) !important;
}

input::placeholder,
textarea::placeholder {
    color: var(--jarvis-muted) !important;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--jarvis-accent) !important;
    box-shadow:
        0 0 0 3px var(--jarvis-glow),
        0 0 25px var(--jarvis-glow) !important;
}

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

button:not(.jarvis-theme-btn) {
    color: #fff !important;

    background:
        linear-gradient(
            135deg,
            var(--jarvis-accent),
            var(--jarvis-accent-2)
        ) !important;

    box-shadow:
        0 12px 30px var(--jarvis-glow) !important;
}

button:not(.jarvis-theme-btn):hover {
    box-shadow:
        0 18px 40px var(--jarvis-glow) !important;
}

/* ===== SNAKE ===== */

.snake-wait {
    background: var(--jarvis-surface) !important;
    border-color: var(--jarvis-border) !important;
}

.snake-status,
.snake-score,
.jarvis-title {
    color: var(--jarvis-accent) !important;
}

.snake-header h3 {
    color: var(--jarvis-text) !important;
}

#snakeGame {
    background: var(--jarvis-bg-2) !important;
    border-color: var(--jarvis-border) !important;
}

.jarvis-message {
    background: color-mix(in srgb, var(--jarvis-accent) 10%, transparent) !important;
    border-color: var(--jarvis-accent) !important;
    color: var(--jarvis-text) !important;
}

/* ===== THEME SWITCHER ===== */

.jarvis-theme-switcher {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 99999;

    display: flex;
    align-items: center;
    gap: 8px;

    padding: 7px;

    border: 1px solid var(--jarvis-border);
    border-radius: 14px;

    background: var(--jarvis-surface);

    box-shadow:
        0 0 22px var(--jarvis-glow);

    backdrop-filter: blur(14px);
}

.jarvis-theme-btn {
    width: auto !important;

    border: 0 !important;
    border-radius: 9px !important;

    padding: 7px 10px !important;

    color: var(--jarvis-muted) !important;
    background: transparent !important;

    font-size: 12px !important;
    font-weight: 700 !important;
    letter-spacing: .08em;

    box-shadow: none !important;
}

.jarvis-theme-btn:hover {
    color: var(--jarvis-text) !important;
    transform: translateY(-1px);
}

.jarvis-theme-btn.active {
    color: #fff !important;
    background: var(--jarvis-accent) !important;

    box-shadow:
        0 0 14px var(--jarvis-glow) !important;
}

.jarvis-theme-switcher.switching {
    animation: jarvisThemePulse .32s ease;
}

@keyframes jarvisThemePulse {
    0%   { transform: scale(1); }
    45%  { transform: scale(.96); }
    100% { transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    body,
    body * {
        transition: none !important;
        animation: none !important;
    }
}

/* ===== JARVIS ICON THEME TOGGLE ===== */

.jarvis-theme-toggle {
    position: fixed !important;
    top: 16px !important;
    right: 16px !important;
    z-index: 999999 !important;

    width: 46px !important;
    height: 46px !important;

    padding: 3px !important;
    margin: 0 !important;

    border: 1px solid var(--jarvis-border) !important;
    border-radius: 50% !important;

    background: rgba(5, 8, 15, .78) !important;

    cursor: pointer !important;

    display: flex !important;
    align-items: center !important;
    justify-content: center !important;

    box-shadow:
        0 0 12px var(--jarvis-glow),
        0 0 28px color-mix(in srgb, var(--jarvis-accent) 18%, transparent) !important;

    backdrop-filter: blur(10px);

    transition:
        transform .25s ease,
        box-shadow .35s ease,
        border-color .35s ease !important;
}

.jarvis-theme-toggle:hover {
    transform: scale(1.08) !important;

    box-shadow:
        0 0 18px var(--jarvis-glow),
        0 0 38px color-mix(in srgb, var(--jarvis-accent) 28%, transparent) !important;
}

.jarvis-theme-toggle:active {
    transform: scale(.94) !important;
}

.jarvis-theme-icon {
    width: 100% !important;
    height: 100% !important;

    display: block !important;

    object-fit: cover !important;
    border-radius: 50% !important;

    pointer-events: none;
}

.jarvis-theme-toggle.switching {
    animation: jarvisIconPulse .45s ease;
}

@keyframes jarvisIconPulse {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }

    35% {
        transform: scale(.88) rotate(-8deg);
        filter: brightness(1.8);
    }

    70% {
        transform: scale(1.12) rotate(5deg);
        filter: brightness(1.5);
    }

    100% {
        transform: scale(1) rotate(0);
        filter: brightness(1);
    }
}

@media (max-width: 600px) {
    .jarvis-theme-toggle {
        width: 42px !important;
        height: 42px !important;
        top: 12px !important;
        right: 12px !important;
    }
}