/**
 * BITCHAT VISUAL IDENTITY — DESIGN TOKENS
 *
 * Global design system for venture-backed product quality.
 * Creates FB / X / Instagram level perception.
 *
 * Usage: Import this file FIRST in container.phtml header
 */

:root {
    /* ========== BRAND COLORS ========== */
    --bc-primary: #6C5CFF;           /* Primary purple - main brand */
    --bc-primary-hover: #5847E6;     /* Darker purple for hover states */
    --bc-primary-light: #8875FF;     /* Light purple for accents */

    --bc-accent: #00D4FF;            /* Cyan accent - highlights */
    --bc-accent-hover: #00BBEA;      /* Darker cyan */

    --bc-success: #22C55E;           /* Green - positive actions */
    --bc-warning: #F59E0B;           /* Amber - warnings */
    --bc-error: #EF4444;             /* Red - errors */

    /* ========== BACKGROUNDS ========== */
    --bc-bg: #F8FAFF;                /* Main app background - soft blue tint */
    --bc-bg-alt: #EEF2FF;            /* Alternative background */
    --bc-card: #FFFFFF;              /* Card/surface background */
    --bc-card-hover: #FAFBFF;        /* Card hover state */

    /* ========== TEXT COLORS ========== */
    --bc-text-primary: #1E293B;      /* Primary text - dark slate */
    --bc-text-secondary: #64748B;    /* Secondary text - muted */
    --bc-text-tertiary: #94A3B8;     /* Tertiary text - very muted */
    --bc-text-inverse: #FFFFFF;      /* Text on dark backgrounds */

    /* ========== BORDER RADIUS ========== */
    --bc-radius-sm: 8px;             /* Small radius - buttons, inputs */
    --bc-radius-md: 12px;            /* Medium radius - cards */
    --bc-radius-lg: 16px;            /* Large radius - major cards */
    --bc-radius-xl: 22px;            /* Extra large - hero sections */
    --bc-radius-full: 9999px;        /* Full circle - avatars, pills */

    /* ========== SHADOWS ========== */
    --bc-shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.06);           /* Subtle elevation */
    --bc-shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.10);         /* Hover elevation */
    --bc-shadow-focus: 0 0 0 4px rgba(108, 92, 255, 0.15);      /* Focus ring */
    --bc-shadow-strong: 0 16px 48px rgba(0, 0, 0, 0.12);        /* Strong elevation */

    /* ========== SPACING SYSTEM ========== */
    --bc-space-xs: 8px;              /* Extra small */
    --bc-space-sm: 12px;             /* Small */
    --bc-space-md: 20px;             /* Medium */
    --bc-space-lg: 32px;             /* Large */
    --bc-space-xl: 48px;             /* Extra large */
    --bc-space-2xl: 64px;            /* 2x extra large */

    /* ========== TYPOGRAPHY ========== */
    --bc-font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --bc-font-size-xs: 12px;         /* Extra small text */
    --bc-font-size-sm: 14px;         /* Small text */
    --bc-font-size-base: 16px;       /* Base text */
    --bc-font-size-lg: 18px;         /* Large text */
    --bc-font-size-xl: 24px;         /* Extra large text */
    --bc-font-size-2xl: 32px;        /* 2x extra large */
    --bc-font-size-3xl: 42px;        /* 3x extra large - hero */

    --bc-font-weight-normal: 400;
    --bc-font-weight-medium: 600;
    --bc-font-weight-bold: 700;

    --bc-line-height-tight: 1.25;
    --bc-line-height-normal: 1.5;
    --bc-line-height-relaxed: 1.75;

    /* ========== TRANSITIONS ========== */
    --bc-transition-fast: 0.15s ease;
    --bc-transition-base: 0.2s ease;
    --bc-transition-slow: 0.3s ease;

    /* ========== Z-INDEX SYSTEM ========== */
    --bc-z-base: 1;
    --bc-z-dropdown: 100;
    --bc-z-sticky: 200;
    --bc-z-fixed: 300;
    --bc-z-modal-backdrop: 400;
    --bc-z-modal: 500;
    --bc-z-tooltip: 600;

    /* ========== CONTAINER WIDTHS ========== */
    --bc-container-sm: 640px;
    --bc-container-md: 768px;
    --bc-container-lg: 1024px;
    --bc-container-xl: 1180px;        /* Main content max width */
    --bc-container-2xl: 1280px;
}

/* ========== GLOBAL RESETS & FOUNDATION ========== */

* {
    box-sizing: border-box;
}

body {
    font-family: var(--bc-font-family);
    font-size: var(--bc-font-size-base);
    line-height: var(--bc-line-height-normal);
    color: var(--bc-text-primary);
    background: var(--bc-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== UTILITY CLASSES ========== */

/* Container */
.bc-container {
    max-width: var(--bc-container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--bc-space-md);
    padding-right: var(--bc-space-md);
}

/* Spacing sections */
.bc-section {
    margin-top: var(--bc-space-xl);
    margin-bottom: var(--bc-space-xl);
}

.bc-section-lg {
    margin-top: var(--bc-space-2xl);
    margin-bottom: var(--bc-space-2xl);
}

/* Card utilities */
.bc-card {
    background: var(--bc-card);
    border-radius: var(--bc-radius-lg);
    box-shadow: var(--bc-shadow-soft);
    padding: var(--bc-space-lg);
    transition: all var(--bc-transition-base);
}

.bc-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--bc-shadow-hover);
}

.bc-card-flat {
    box-shadow: none;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

/* Text utilities */
.bc-text-primary { color: var(--bc-text-primary); }
.bc-text-secondary { color: var(--bc-text-secondary); }
.bc-text-tertiary { color: var(--bc-text-tertiary); }

/* Gradient backgrounds */
.bc-gradient-primary {
    background: linear-gradient(135deg, var(--bc-primary), var(--bc-accent));
}

.bc-gradient-soft {
    background: linear-gradient(to bottom, var(--bc-bg), var(--bc-bg-alt));
}

/* Remove hard borders */
.bc-no-border {
    border: none !important;
}

/* Modern button base */
.bc-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--bc-space-xs);
    padding: 12px 24px;
    border-radius: var(--bc-radius-sm);
    font-weight: var(--bc-font-weight-medium);
    font-size: var(--bc-font-size-base);
    transition: all var(--bc-transition-base);
    border: none;
    cursor: pointer;
}

.bc-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--bc-shadow-soft);
}

.bc-btn-primary {
    background: var(--bc-primary);
    color: var(--bc-text-inverse);
}

.bc-btn-primary:hover {
    background: var(--bc-primary-hover);
}

/* Smooth transitions on interactive elements (scoped to avoid nav jump) */
button, input, textarea, select {
    transition: background-color var(--bc-transition-base), color var(--bc-transition-base),
                box-shadow var(--bc-transition-base), border-color var(--bc-transition-base);
}
a {
    transition: color var(--bc-transition-base), opacity var(--bc-transition-base);
}

/* Remove outline, add focus ring */
*:focus {
    outline: none;
}

*:focus-visible {
    box-shadow: var(--bc-shadow-focus);
}

/* ========== RESPONSIVE BREAKPOINTS ========== */
@media (max-width: 768px) {
    :root {
        --bc-space-xl: 32px;
        --bc-space-2xl: 48px;
    }

    .bc-container {
        padding-left: var(--bc-space-sm);
        padding-right: var(--bc-space-sm);
    }
}

/* ========== GLASS MORPHISM UTILITY ========== */
.bc-glass {
    backdrop-filter: blur(16px) saturate(180%);
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.bc-glass-dark {
    backdrop-filter: blur(16px) saturate(180%);
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========== ELEVATION SYSTEM ========== */
.bc-elevation-0 { box-shadow: none; }
.bc-elevation-1 { box-shadow: var(--bc-shadow-soft); }
.bc-elevation-2 { box-shadow: var(--bc-shadow-hover); }
.bc-elevation-3 { box-shadow: var(--bc-shadow-strong); }

/* ========== ANIMATION UTILITIES ========== */
@keyframes bc-fade-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bc-slide-up {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

@keyframes bc-scale-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.bc-animate-fade-in {
    animation: bc-fade-in 0.3s ease;
}

.bc-animate-slide-up {
    animation: bc-slide-up 0.3s ease;
}

.bc-animate-scale-in {
    animation: bc-scale-in 0.3s ease;
}