/* ==========================================================================
   Footprint - Base CSS (Design Tokens, Reset, Layout & Ambient)
   ========================================================================== */

:root {
    --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --radius: 20px;
    --radius-sm: 14px;
    --radius-full: 9999px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg: #0B0E14;
    --bg-elevated: #151A24;
    --bg-card: #121620;
    --text: #F8FAFC;
    --text-sec: #94A3B8;
    --text-muted: #64748B;
    --border: rgba(255, 255, 255, 0.08);
    --glass: rgba(18, 22, 32, 0.85);
    --glass-border: rgba(255, 255, 255, 0.12);
}

[data-theme="light"] {
    --bg: #F8F6F0;
    --bg-elevated: #FFFFFF;
    --bg-card: #FFFFFF;
    --text: #1E293B;
    --text-sec: #64748B;
    --text-muted: #94A3B8;
    --border: rgba(0, 0, 0, 0.08);
    --glass: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.08);
}

[data-mode="travel"] {
    --primary: #0D9488;
    --glow: rgba(13, 148, 136, 0.25);
    --gradient: linear-gradient(135deg, #0D9488, #2563EB);
    --mode-bg: rgba(13, 148, 136, 0.08);
}

[data-mode="food"] {
    --primary: #D97706;
    --glow: rgba(217, 119, 6, 0.25);
    --gradient: linear-gradient(135deg, #D97706, #EA580C);
    --mode-bg: rgba(217, 119, 6, 0.08);
}

[data-mode="love"] {
    --primary: #E11D48;
    --glow: rgba(225, 29, 72, 0.25);
    --gradient: linear-gradient(135deg, #E11D48, #9333EA);
    --mode-bg: rgba(225, 29, 72, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
}

*::-webkit-scrollbar {
    width: 0px !important;
    height: 0px !important;
    display: none !important;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

@supports (-webkit-touch-callout: none) {
    body {
        min-height: -webkit-fill-available;
    }
}

.glass {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
}

/* Ambient Floating Background */
.dynamic-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.bg-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.08;
    animation: blobFloat 20s ease-in-out infinite;
}

.bg-blob-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    left: -100px;
}

.bg-blob-2 {
    width: 350px;
    height: 350px;
    background: #06B6D4;
    bottom: -100px;
    right: -100px;
    animation-delay: -7s;
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, 30px) scale(1.1); }
}

.app {
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* ==========================================================================
   SVG Vector Icon System (Lucide Aesthetic Standards)
   ========================================================================== */
.svg-icon {
    display: inline-block;
    width: 1.15em;
    height: 1.15em;
    stroke-width: 1.85;
    stroke: currentColor;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: -0.18em;
    flex-shrink: 0;
    transition: transform 0.2s ease, stroke 0.2s ease;
}

.svg-icon.icon-sm {
    width: 14px;
    height: 14px;
    stroke-width: 2;
}

.svg-icon.icon-md {
    width: 18px;
    height: 18px;
    stroke-width: 1.85;
}

.svg-icon.icon-lg {
    width: 22px;
    height: 22px;
    stroke-width: 1.75;
}

.svg-icon.icon-xl {
    width: 28px;
    height: 28px;
    stroke-width: 1.65;
}

.btn:hover .svg-icon,
.feature-pill-btn:hover .svg-icon {
    transform: translateY(-1px);
}