/* ========================================
   ERÜ Randevu Sistemi - Modern Minimalist Design
   Clean, Professional, and Accessible
   ======================================== */

/* CSS Variables - Refined Color Palette */
:root {
    /* Primary - Deep Blue */
    --color-primary: #0f172a;
    --color-primary-hover: #1e293b;
    --color-primary-light: #334155;
    
    /* Accent - Subtle Blue */
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-accent-light: #eff6ff;
    
    /* Status Colors - Muted */
    --color-success: #059669;
    --color-success-bg: #ecfdf5;
    --color-warning: #d97706;
    --color-warning-bg: #fffbeb;
    --color-danger: #dc2626;
    --color-danger-bg: #fef2f2;
    --color-info: #0284c7;
    --color-info-bg: #f0f9ff;
    
    /* Neutrals - Clean Grays */
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-text-inverse: #ffffff;
    
    --color-bg: #f8fafc;
    --color-bg-elevated: #ffffff;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows - Subtle */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    
    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
}

/* ========================================
   Login Page
   ======================================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background-color: var(--color-bg);
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border-light);
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.login-header .logo {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-5);
    color: var(--color-primary);
}

.login-header .logo svg {
    width: 100%;
    height: 100%;
    stroke-width: 1.5;
}

.login-header h1 {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    letter-spacing: -0.025em;
    margin-bottom: var(--space-1);
}

.login-header p {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.login-footer {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border-light);
    text-align: center;
}

.login-footer p {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ========================================
   Form Elements
   ======================================== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
}

.form-group input,
.form-group select {
    width: 100%;
    height: 44px;
    padding: 0 var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--color-text);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:hover,
.form-group select:hover {
    border-color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.form-group input::placeholder {
    color: var(--color-text-muted);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    padding-right: var(--space-10);
}

.form-row {
    display: grid;
    gap: var(--space-4);
}

.form-row-3 {
    grid-template-columns: repeat(3, 1fr);
}

.form-actions {
    margin-top: var(--space-2);
}

.error-message {
    padding: var(--space-3) var(--space-4);
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    border: 1px solid rgba(220, 38, 38, 0.1);
}

.hidden {
    display: none !important;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    height: 44px;
    padding: 0 var(--space-5);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
}

.btn-primary:active:not(:disabled) {
    background-color: var(--color-primary-light);
}

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

.btn-accent:hover:not(:disabled) {
    background-color: var(--color-accent-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #b91c1c;
}

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

.btn-success:hover:not(:disabled) {
    background-color: #047857;
}

.btn-secondary {
    background-color: #6b7280;
    color: var(--color-text-inverse);
}

.btn-secondary:hover:not(:disabled) {
    background-color: #4b5563;
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-border-light);
    color: var(--color-text);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--color-bg);
    border-color: var(--color-text-muted);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    height: 36px;
    padding: 0 var(--space-3);
    font-size: var(--text-xs);
}

.btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Spinner */
.spinner {
    animation: spin 0.8s linear infinite;
    width: 18px;
    height: 18px;
}

.spinner circle {
    stroke-dasharray: 60;
    stroke-dashoffset: 45;
    stroke-linecap: round;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* ========================================
   App Layout - Unified Structure
   ======================================== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Unified App Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 var(--space-6);
    background-color: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex: 1;
}

.header-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-2);
    flex: 1;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    letter-spacing: -0.01em;
    text-decoration: none;
    line-height: 1;
}

.header-brand:hover {
    color: var(--color-text);
}

.header-brand svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    stroke-width: 1.5;
    flex-shrink: 0;
}

.header-brand span {
    line-height: 1;
}

.header-title {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-text);
}

.back-link svg {
    width: 18px;
    height: 18px;
    stroke-width: 1.5;
}

/* Unified Main Content */
.app-main {
    flex: 1;
    padding: var(--space-8);
    max-width: 1024px;
    margin: 0 auto;
    width: 100%;
}

/* Legacy support - map old classes to new */
.dashboard-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 var(--space-6);
    background-color: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.dashboard-main {
    flex: 1;
    padding: var(--space-8);
    max-width: 1024px;
    margin: 0 auto;
    width: 100%;
}

/* ========================================
   Cards
   ======================================== */
.card {
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
}

.card + .card {
    margin-top: var(--space-6);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-border-light);
}

.card-header h2 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.card-header p {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

/* New Session Form */
.new-session-card .session-form {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

/* Sessions List */
.sessions-list {
    max-height: 420px;
    overflow-y: auto;
}

.sessions-list::-webkit-scrollbar {
    width: 6px;
}

.sessions-list::-webkit-scrollbar-track {
    background: transparent;
}

.sessions-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    color: var(--color-text-muted);
}

.empty-state svg {
    margin-bottom: var(--space-4);
    opacity: 0.4;
    stroke-width: 1.5;
}

.empty-state p {
    font-size: var(--text-sm);
}

.session-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border-light);
    transition: background-color var(--transition-fast);
}

.session-item:hover {
    background-color: var(--color-bg);
}

.session-item:last-child {
    border-bottom: none;
}

.session-info {
    flex: 1;
    min-width: 0;
    cursor: pointer;
}

.session-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    border-radius: var(--radius-md);
    background-color: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--color-border-light);
    color: var(--color-text);
}

.btn-icon.btn-delete:hover {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.session-patient {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.session-patient strong {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    font-variant-numeric: tabular-nums;
}

.session-department {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

.session-meta {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-1);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-full);
    letter-spacing: 0.01em;
}

.status-pending {
    background-color: var(--color-border-light);
    color: var(--color-text-secondary);
}

.status-running {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.status-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.status-failed {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.status-stopped {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.status-paused {
    background-color: #fef3c7;
    color: #92400e;
}

/* ========================================
   Session View Page
   ======================================== */
.session-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.session-main {
    flex: 1;
    padding: var(--space-8);
    max-width: 1024px;
    margin: 0 auto;
    width: 100%;
}

/* Legacy session header - now using app-header */
.session-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 var(--space-6);
    background-color: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* Session Info Card */
.session-info-card {
    margin-bottom: var(--space-6);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-6);
    padding: var(--space-6);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.info-item label {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-item span {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
}

/* Result Card */
.result-card {
    padding: var(--space-10);
    text-align: center;
    margin-bottom: var(--space-6);
}

.result-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-5);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-icon svg {
    stroke-width: 1.5;
}

.result-icon.success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.result-icon.failed {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.result-icon.stopped {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.result-card h2 {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.result-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* Logs Card */
.logs-card {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.log-controls {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--color-primary);
}

.logs-container {
    flex: 1;
    min-height: 320px;
    max-height: 480px;
    overflow-y: auto;
    padding: var(--space-4);
    background-color: #0f172a;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.logs-container::-webkit-scrollbar {
    width: 8px;
}

.logs-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.logs-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
}

.log-entry {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-1) 0;
}

.log-time {
    color: #64748b;
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
}

.log-level {
    flex-shrink: 0;
    font-weight: var(--font-medium);
    min-width: 72px;
}

.log-message {
    word-break: break-word;
    color: #e2e8f0;
}

.log-info .log-level { color: #64748b; }
.log-info .log-message { color: #94a3b8; }

.log-success .log-level { color: #34d399; }
.log-success .log-message { color: #6ee7b7; }

.log-warning .log-level { color: #fbbf24; }
.log-warning .log-message { color: #fcd34d; }

.log-error .log-level { color: #f87171; }
.log-error .log-message { color: #fca5a5; }

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .form-row-3 {
        grid-template-columns: 1fr;
    }
    
    .app-main,
    .dashboard-main,
    .session-main {
        padding: var(--space-4);
    }
    
    .app-header,
    .dashboard-header,
    .session-header {
        padding: 0 var(--space-4);
    }
    
    .card-header {
        padding: var(--space-4);
    }
    
    .new-session-card .session-form {
        padding: var(--space-4);
    }
    
    .session-item {
        padding: var(--space-4);
    }
    
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: var(--space-4);
    }
    
    .login-card {
        padding: var(--space-8);
    }
    
    .header-right {
        gap: var(--space-1);
    }
    
    .btn-sm {
        padding: 0 var(--space-2);
    }
    
    .header-title {
        font-size: var(--text-sm);
    }
}

@media (max-width: 480px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .session-patient {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
    }
    
    .session-meta {
        flex-direction: column;
        gap: var(--space-1);
    }
    
    .header-title {
        font-size: var(--text-xs);
    }
    
    .header-center {
        display: none;
    }
    
    .header-right .btn span:not(.sr-only) {
        display: none;
    }
    
    .header-right .btn {
        padding: 0 var(--space-2);
        min-width: 36px;
    }
}

/* ========================================
   Utilities
   ======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Smooth scrolling */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #64748b;
        --color-text-muted: #64748b;
    }
}

/* Print styles */
@media print {
    .app-header,
    .dashboard-header,
    .session-header,
    .btn,
    .log-controls {
        display: none;
    }
    
    .logs-container {
        max-height: none;
        background: white;
        color: black;
    }
}