@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
    --bg-base: #0a0b0d;
    --bg-surface: #111317;
    --bg-elevated: #181b22;
    --bg-hover: #222630;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.18);
    --border-accent: rgba(255, 72, 0, 0.4);
    --text-main: #f3f4f6;
    --text-muted: #8e95a5;
    --text-dim: #5a6170;
    --accent-signal: #ff4800;
    --accent-signal-muted: rgba(255, 72, 0, 0.12);
    --accent-glow: rgba(255, 72, 0, 0.25);
    
    /* Emil Kowalski motion curves */
    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
    --dur-micro: 120ms;
    --dur-short: 180ms;
    --dur-medium: 240ms;
}

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

html {
    scroll-behavior: smooth;
    color-scheme: dark;
    font-size: 16px;
}

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100dvh;
    overflow-x: hidden;
    position: relative;
}

/* Blueprint Grid Mode */
body.blueprint-mode::before {
    content: "";
    position: fixed;
    inset: 0;
    background-size: 32px 32px;
    background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    pointer-events: none;
    z-index: 999;
}

/* Typography rules from baseline-ui & frontend-design */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    letter-spacing: -0.025em;
    text-wrap: balance;
    color: var(--text-main);
}

p, li, span, label {
    text-wrap: pretty;
}

.font-mono-code {
    font-family: 'JetBrains Mono', monospace;
}

.tabular-nums {
    font-variant-numeric: tabular-nums;
}

/* Emil Kowalski tactile interactive elements */
button, a.btn, input, select, textarea {
    font-family: inherit;
}

.interactive-tap {
    transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-micro) ease, border-color var(--dur-micro) ease;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.interactive-tap:active {
    transform: scale(0.97);
}

/* Touch targets >= 44px for accessibility */
.min-touch {
    min-height: 44px;
    min-width: 44px;
}

/* Custom focus ring */
:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--bg-base), 0 0 0 4px var(--accent-signal);
}

/* Asymmetric cards & architectural grid */
.arch-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    transition: border-color var(--dur-short) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
    .arch-card:hover {
        border-color: var(--border-strong);
        background: var(--bg-elevated);
    }
}

/* Project Drawer & Modal Animations */
.drawer-backdrop {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-medium) var(--ease-out);
}

.drawer-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.drawer-panel {
    transform: translateX(100%);
    transition: transform var(--dur-medium) var(--ease-out);
}

.drawer-backdrop.active .drawer-panel {
    transform: translateX(0);
}

/* Modal Dialog */
.modal-backdrop {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-short) var(--ease-out);
}

.modal-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    transform: scale(0.96) translateY(12px);
    opacity: 0;
    transition: transform var(--dur-medium) var(--ease-out), opacity var(--dur-medium) var(--ease-out);
}

.modal-backdrop.active .modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

/* Filter Tab Indicator */
.tab-btn {
    position: relative;
    transition: color var(--dur-micro) ease;
}

.tab-btn.active {
    color: var(--text-main);
    background: var(--bg-elevated);
    border-color: var(--border-strong);
}

/* Material Specimen Interactive Preview */
.material-chip {
    transition: all var(--dur-micro) var(--ease-out);
}
.material-chip.active {
    border-color: var(--accent-signal);
    background: var(--accent-signal-muted);
    color: var(--text-main);
}

/* Toast Container (Sonner style) */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column-reverse;
    gap: 8px;
    pointer-events: none;
}

.toast-item {
    pointer-events: auto;
    background: #15181f;
    border: 1px solid var(--border-strong);
    color: var(--text-main);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(16px) scale(0.96);
    opacity: 0;
    transition: transform var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out);
}

.toast-item.show {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.toast-item.hide {
    transform: translateY(-8px) scale(0.96);
    opacity: 0;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}

/* Range input styling */
input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: var(--bg-elevated);
    height: 6px;
    border-radius: 3px;
    outline: none;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-signal);
    cursor: pointer;
    border: 2px solid var(--bg-base);
    transition: transform var(--dur-micro) var(--ease-out);
}

input[type=range]:active::-webkit-slider-thumb {
    transform: scale(1.2);
}

/* Reduced Motion respect */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}