/* Claude Desktop — Design-System (Phase 9)
 *
 * Single Source of Truth fuer Farben, Typografie, Spacing, Radius.
 * Jede Komponente nutzt ausschliesslich diese Variablen — keine
 * hardgecodeten Hex-Werte, keine Inline-Padding-Pixelwerte.
 *
 * Aufbau:
 *   1. Farb-Palette (4 Graustufen + 1 Akzent + 4 Status)
 *   2. Typografie (1 Sans + 1 Mono, 5 Schriftgroessen)
 *   3. Spacing (4-Punkt-Grid, 6 Stufen)
 *   4. Border-Radius (2 Stufen)
 *   5. Schatten & Animationen
 *   6. Reset + Basis
 */

:root {
	/* === 1. Farben (Dark, Default) ============================== */

	/* Grautoene */
	--bg-primary:    #1a1a1a;   /* Editor / Hauptbereich */
	--bg-secondary:  #242424;   /* Sidebar / Panels */
	--bg-tertiary:   #2d2d2d;   /* Hover, Card-BG, Selected */
	--bg-input:      #1f1f1f;   /* Input-Felder */
	--bg-hover:      #2a2a2a;   /* dezenter Hover-State */
	--bg-selected:   #094771;   /* aktive Auswahl in Listen */

	/* Borders */
	--border:        #3e3e42;   /* Standard-Trenner */
	--border-strong: #525257;   /* Aktive / Focus */

	/* Text */
	--text-primary:   #e0e0e0;
	--text-secondary: #9a9a9a;
	--text-disabled:  #5a5a5a;
	--text-heading:   #f0f0f0;

	/* Akzent (1 Farbe) */
	--accent:         #007acc;
	--accent-hover:   #1177bb;
	--accent-fg:      #ffffff;
	--focus:          #007fd4;
	--link:           #3794ff;

	/* Status (4 Farben) */
	--status-success: #6a9955;
	--status-warning: #f5a623;
	--status-error:   #f48771;
	--status-info:    #569cd6;

	/* Diff-Farben (Code-Kontext) */
	--diff-added-bg:    rgba(106, 153, 85, 0.18);
	--diff-removed-bg:  rgba(244, 135, 113, 0.18);
	--diff-added-fg:    #6a9955;
	--diff-removed-fg:  #f48771;

	/* Aliase fuer Altcode (deprecated, werden ueber Phase 9-12 entfernt) */
	--success: var(--status-success);
	--warning: var(--status-warning);
	--error:   var(--status-error);

	/* === 2. Typografie ========================================= */

	--font-sans: 'Inter', -apple-system, 'Segoe UI', 'Roboto', 'Noto Sans', system-ui, sans-serif;
	--font-mono: 'JetBrains Mono', 'Hack', 'Fira Code', 'Consolas', monospace;

	--fs-xs:  11px;   /* Metadaten, Timestamps, Status-Bar */
	--fs-sm:  12px;   /* Sidebar, sekundaere UI */
	--fs-md:  13px;   /* Body, Chat, Code */
	--fs-lg:  14px;   /* UI-Header */
	--fs-xl:  16px;   /* Dialog-Titel */

	--fw-normal: 400;
	--fw-medium: 500;
	--fw-semi:   600;

	--lh-tight:  1.4;
	--lh-normal: 1.5;
	--lh-code:   1.6;

	/* === 3. Spacing (4-Punkt-Grid) ============================= */

	--sp-1: 4px;
	--sp-2: 8px;
	--sp-3: 12px;
	--sp-4: 16px;
	--sp-5: 24px;
	--sp-6: 32px;

	/* Legacy-Aliase (werden in Komponenten-Pass entfernt) */
	--spacing-xs: var(--sp-1);
	--spacing-sm: var(--sp-2);
	--spacing-md: var(--sp-4);
	--spacing-lg: var(--sp-5);
	--spacing-xl: var(--sp-6);

	/* === 4. Border-Radius (max. 2 Werte) ======================= */

	--r-sm: 3px;   /* Inputs, Buttons */
	--r-md: 6px;   /* Karten, Modals, Drawer */

	/* Legacy-Aliase */
	--radius-sm: var(--r-sm);
	--radius-md: var(--r-md);
	--radius-lg: var(--r-md);

	/* === 5. Schatten & Animationen ============================= */

	--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
	--shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
	--shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);

	--ease:      cubic-bezier(0.4, 0, 0.2, 1);
	--dur-fast:  120ms;
	--dur-base:  200ms;

	/* === Layout-Konstanten ===================================== */

	--titlebar-height:  36px;
	--statusbar-height: 22px;
	--sidebar-width:    240px;
	--sidebar-collapsed: 48px;
	--drawer-width:     360px;
	--tabbar-height:    32px;
}

/* === 6. Reset + Basis ========================================= */

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

html, body {
	height: 100%;
	font-family: var(--font-sans);
	font-size: var(--fs-md);
	font-weight: var(--fw-normal);
	line-height: var(--lh-normal);
	background: var(--bg-primary);
	color: var(--text-primary);
	overflow: hidden;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

button {
	font-family: inherit;
	font-size: inherit;
	cursor: pointer;
	border: none;
	background: none;
	color: inherit;
}

input, textarea, select {
	font-family: inherit;
	font-size: var(--fs-md);
	color: var(--text-primary);
	background: var(--bg-input);
	border: 1px solid var(--border);
	border-radius: var(--r-sm);
	padding: var(--sp-2) var(--sp-3);
	transition: border-color var(--dur-fast) var(--ease);
}

/* WebKitGTK ignoriert haeufig CSS-Background bei nativen <select> und nimmt
   stattdessen das System-Theme (oft weiss). appearance:none zwingt CSS durch.
   Eigener Chevron als SVG-Background damit das Element nicht "nackt" wirkt. */
select {
	appearance: none;
	-webkit-appearance: none;
	background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path fill='%23999' d='M0 0l5 6 5-6z'/></svg>");
	background-repeat: no-repeat;
	background-position: right 8px center;
	padding-right: 24px;
	cursor: pointer;
}
/* Option-Eintraege werden in vielen Engines vom OS-Theme gerendert —
   color/background trotzdem setzen, manche Engines respektieren es. */
select option {
	background: var(--bg-secondary, var(--bg-input));
	color: var(--text-primary);
}

input:focus, textarea:focus, select:focus {
	outline: none;
	border-color: var(--focus);
}

code, pre {
	font-family: var(--font-mono);
	font-size: var(--fs-md);
}

code {
	background: var(--bg-tertiary);
	border-radius: var(--r-sm);
	padding: 1px 4px;
}

pre {
	background: var(--bg-input);
	border: 1px solid var(--border);
	border-radius: var(--r-sm);
	padding: var(--sp-3);
	overflow-x: auto;
	line-height: var(--lh-code);
}

h1, h2, h3, h4 {
	color: var(--text-heading);
	font-weight: var(--fw-semi);
}

h1 { font-size: var(--fs-xl); }
h2 { font-size: var(--fs-lg); }
h3 { font-size: var(--fs-md); }
h4 { font-size: var(--fs-sm); }

a {
	color: var(--link);
	text-decoration: none;
}

a:hover {
	text-decoration: underline;
}

/* Scrollbars (subtil, VS-Code-Look) */
::-webkit-scrollbar {
	width: 10px;
	height: 10px;
}
::-webkit-scrollbar-track {
	background: transparent;
}
::-webkit-scrollbar-thumb {
	background: rgba(121, 121, 121, 0.4);
	border-radius: 5px;
	border: 2px solid transparent;
	background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover {
	background: rgba(100, 100, 100, 0.7);
	background-clip: content-box;
}

::selection {
	background: var(--bg-selected);
	color: var(--text-primary);
}

/* Animationen */
@keyframes pulse {
	0%, 100% { opacity: 1; }
	50%      { opacity: 0.5; }
}

@keyframes spin {
	from { transform: rotate(0deg); }
	to   { transform: rotate(360deg); }
}

@keyframes fade-in {
	from { opacity: 0; }
	to   { opacity: 1; }
}

@keyframes slide-in-right {
	from { transform: translateX(100%); }
	to   { transform: translateX(0); }
}

.animate-pulse  { animation: pulse 2s ease-in-out infinite; }
.animate-spin   { animation: spin 1s linear infinite; }
.animate-fade-in { animation: fade-in var(--dur-base) var(--ease); }

/* Utility-Klassen (nur Selten genutzt — bevorzugt Komponenten) */
.text-secondary  { color: var(--text-secondary); }
.text-mono       { font-family: var(--font-mono); }
.tabular-nums    { font-variant-numeric: tabular-nums; }