/* ====== Kairos Design System — 暖杏奶油 · Apple 品质 ====== */

:root {
    /* Warm apricot accent */
    --color-accent: #E8965B;
    --color-accent-light: #F0B88A;
    --color-accent-dark: #C87A42;
    --color-accent-subtle: rgba(232, 150, 91, 0.1);
    --color-accent-glow: rgba(232, 150, 91, 0.4);

    /* Semantic */
    --color-danger: #FF3B30;
    --color-success: #34C759;
    --color-warning: #FF9500;

    /* Cream surfaces */
    --color-bg: #FBF7F2;
    --color-bg-secondary: #F5EDE3;
    --color-bg-card: #FFFFFF;
    --color-bg-elevated: #FFFFFF;
    --color-bg-primary: var(--color-bg);
    --color-surface: var(--color-bg-card);
    --surface-color: var(--color-bg-card);

    /* Warm text */
    --color-text: #2C1810;
    --color-text-secondary: #6B5648;
    --color-text-tertiary: #A69080;
    --color-text-quaternary: #CFC0B4;
    --color-text-primary: var(--color-text);

    /* Separators */
    --color-separator: rgba(44, 24, 16, 0.06);
    --color-separator-strong: rgba(44, 24, 16, 0.1);

    /* Shadows — Apple subtle */
    --shadow-sm: 0 0.5px 1px rgba(44, 24, 16, 0.02);
    --shadow-md: 0 1px 2px rgba(44, 24, 16, 0.04);
    --shadow-lg: 0 2px 8px rgba(44, 24, 16, 0.06);
    --shadow-xl: 0 4px 16px rgba(44, 24, 16, 0.08);

    /* Glass morphism */
    --glass-bg: rgba(251, 247, 242, 0.82);
    --glass-border: rgba(255, 255, 255, 0.5);
    --material-bg: rgba(255, 255, 255, 0.72);
    --material-bg-strong: rgba(255, 255, 255, 0.9);
    --material-border: rgba(44, 24, 16, 0.07);
    --material-blur: 28px;

    /* Radius */
    --radius-xs: 6px; --radius-sm: 10px; --radius-md: 14px;
    --radius-lg: 20px; --radius-xl: 28px; --radius-full: 9999px;

    /* Spacing — 4pt grid */
    --space-1: 4px; --space-2: 8px; --space-3: 12px;
    --space-4: 16px; --space-5: 20px; --space-6: 24px;
    --space-8: 32px; --space-10: 40px; --space-12: 48px;

    /* Typography — Apple SF scale */
    --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Helvetica Neue', sans-serif;
    --font-serif: 'Noto Serif SC', 'Songti SC', serif;
    --text-xs: 0.75rem; --text-sm: 0.8125rem;
    --text-base: 0.9375rem; --text-lg: 1.0625rem;
    --text-xl: 1.25rem; --text-2xl: 1.5rem; --text-3xl: 2rem;

    /* Animation */
    --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-spring: cubic-bezier(0.22, 0.61, 0.36, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --duration-fast: 150ms; --duration-normal: 250ms; --duration-slow: 400ms;

    /* Layout */
    --header-height: 48px;
    --sidebar-width: 300px;

    /* Legacy compat — 旧 CSS 使用的变量名 */
    --shadow-xs: 0 0.5px 1px rgba(44, 24, 16, 0.02);
    --color-border: var(--color-separator);
    --color-border-subtle: var(--color-separator);
    --color-divider: var(--color-separator);
    --color-primary: var(--color-accent);
    --color-primary-light: var(--color-accent-light);
    --color-primary-dark: var(--color-accent-dark);
    --color-primary-subtle: var(--color-accent-subtle);
    --color-primary-rgb: 232, 150, 91;
    --color-btn-primary: #2C1810;
    --color-info: #1976D2;
    --color-focus-ring: rgba(232, 150, 91, 0.18);
    --control-height: 44px;

    /* Voice call */
    --voice-avatar-bg: rgba(232, 150, 91, 0.1);
    --voice-card-bg: rgba(255, 255, 255, 0.03);
    --voice-waveform-bg: rgba(232, 150, 91, 0.06);
    --voice-online-color: #34C759;
    --voice-speaking-color: #FF3B30;
}

/* ====== Dark Theme ====== */
[data-theme="dark"] {
    --color-accent: #E8965B;
    --color-accent-light: #F0B88A;
    --color-accent-dark: #C87A42;
    --color-accent-subtle: rgba(232, 150, 91, 0.12);
    --color-accent-glow: rgba(232, 150, 91, 0.2);

    --color-bg: #1C1410;
    --color-bg-secondary: #261E18;
    --color-bg-card: #261E18;
    --color-bg-elevated: #302820;
    --color-bg-primary: var(--color-bg);
    --color-surface: var(--color-bg-card);
    --surface-color: var(--color-bg-card);

    --color-text: #F0EAE4;
    --color-text-secondary: #C8BFB6;
    --color-text-tertiary: #8A8078;
    --color-text-quaternary: #5E5650;
    --color-text-primary: var(--color-text);

    --color-separator: rgba(240, 234, 228, 0.06);
    --color-separator-strong: rgba(240, 234, 228, 0.1);

    --shadow-sm: 0 0.5px 1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 1px 2px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-xl: 0 4px 16px rgba(0, 0, 0, 0.35);

    --glass-bg: rgba(28, 20, 16, 0.82);
    --glass-border: rgba(255, 255, 255, 0.06);
    --material-bg: rgba(38, 30, 24, 0.72);
    --material-bg-strong: rgba(38, 30, 24, 0.92);
    --material-border: rgba(240, 234, 228, 0.07);

    --color-btn-primary: #F0EAE4;
    --color-focus-ring: rgba(232, 150, 91, 0.22);
    --voice-avatar-bg: rgba(232, 150, 91, 0.15);
    --voice-waveform-bg: rgba(232, 150, 91, 0.08);
}

/* ====== Global Reset ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-sans); font-size: var(--text-base); color: var(--color-text); background: var(--color-bg); line-height: 1.5; min-height: 100dvh; overflow-x: hidden; }
a { color: var(--color-accent); text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, textarea { font: inherit; color: inherit; }
::selection { background: var(--color-accent-subtle); color: var(--color-accent-dark); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.001ms !important;
    }
}