/**
 * MASTERPLAN ANTRENAMENT — Stiluri globale
 * Mobile-first, profesionist, accesibil
 */

/* ============ RESET & BASE ============ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Paletă culori — profesionist clean */
    --color-primary: #1e3a8a;        /* Albastru închis */
    --color-primary-light: #3b82f6;  /* Albastru mediu */
    --color-primary-dark: #1e293b;   /* Slate dark */
    
    --color-success: #059669;
    --color-warning: #d97706;
    --color-danger: #dc2626;
    --color-info: #0284c7;
    
    --color-bg: #f8fafc;             /* Light gray background */
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9;
    
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    
    --color-border: #e2e8f0;
    --color-border-strong: #cbd5e1;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Menlo, Monaco, Consolas, "Courier New", monospace;
    
    /* Spacing */
    --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;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============ LAYOUT ============ */
.container {
    width: 100%;
    max-width: 768px;
    margin: 0 auto;
    padding: var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding: var(--space-6);
    }
}

/* ============ HEADER ============ */
.app-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.app-header-content {
    max-width: 768px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary-dark);
}

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

.app-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.app-nav a:hover {
    color: var(--color-primary);
    background: var(--color-surface-alt);
}

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-3);
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.text-muted { color: var(--color-text-muted); }
.text-small { font-size: 0.875rem; }
.text-tiny { font-size: 0.75rem; }
.text-bold { font-weight: 600; }
.text-center { text-align: center; }

/* ============ CARDS ============ */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--space-3);
    margin-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary-dark);
}

/* ============ FORMS ============ */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    -webkit-appearance: none;
    appearance: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

.form-textarea {
    min-height: 80px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-help {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

.form-error {
    font-size: 0.875rem;
    color: var(--color-danger);
    margin-top: var(--space-1);
}

/* ============ BUTTONS ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: inherit;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    -webkit-appearance: none;
    appearance: none;
    min-height: 44px;                  /* Touch-friendly */
}

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

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

.btn-primary:active {
    transform: translateY(1px);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border-strong);
}

.btn-secondary:hover {
    background: var(--color-surface-alt);
}

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

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

.btn-block {
    width: 100%;
}

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

/* ============ ALERTS ============ */
.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: 0.9375rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: #dbeafe;
    color: #1e3a8a;
    border: 1px solid #bfdbfe;
}

/* ============ LOGIN PAGE ============ */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-4);
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

.login-card {
    background: var(--color-surface);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-logo {
    text-align: center;
    margin-bottom: var(--space-6);
}

.login-logo h1 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.login-logo p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ============ UTILITIES ============ */
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }

.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-gap-2 { gap: var(--space-2); }
.flex-gap-3 { gap: var(--space-3); }

.hidden { display: none; }

/* ============ COLLAPSIBLE (pentru tehnică detaliată) ============ */
.collapsible {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
    overflow: hidden;
}

.collapsible-header {
    padding: var(--space-3) var(--space-4);
    background: var(--color-surface-alt);
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}

.collapsible-header:hover {
    background: var(--color-border);
}

.collapsible-icon {
    transition: transform var(--transition-fast);
}

.collapsible.is-open .collapsible-icon {
    transform: rotate(180deg);
}

.collapsible-body {
    padding: 0 var(--space-4);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
}

.collapsible.is-open .collapsible-body {
    padding: var(--space-4);
    max-height: 5000px;
}

/* ============ SLOT-URI ANTRENAMENT ============ */
.slot {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-5);
    overflow: hidden;
    background: var(--color-surface);
}

.slot-header {
    padding: var(--space-4);
    background: var(--color-primary-dark);
    color: white;
    font-weight: 600;
}

.slot-number {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    margin-right: var(--space-2);
}

.slot-body {
    padding: var(--space-4);
}

.slot-params {
    background: var(--color-surface-alt);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: 0.875rem;
}

.slot-params dt {
    font-weight: 500;
    color: var(--color-text-muted);
    display: inline;
}

.slot-params dd {
    display: inline;
    margin-left: var(--space-1);
    color: var(--color-text);
}

.slot-params dd::after {
    content: " · ";
    color: var(--color-text-light);
    margin-right: var(--space-1);
}

.slot-params dd:last-child::after {
    content: "";
}

/* Set tracking */
.set-row {
    display: grid;
    grid-template-columns: auto 1fr 1fr 60px;
    gap: var(--space-2);
    align-items: center;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-border);
}

.set-row:last-child {
    border-bottom: none;
}

.set-label {
    font-size: 0.875rem;
    font-weight: 500;
    min-width: 50px;
}

.set-input {
    padding: var(--space-2);
    text-align: center;
    font-size: 1rem;
}

/* History badge */
.history-badge {
    background: var(--color-info);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    display: inline-block;
}

.history-empty {
    color: var(--color-text-muted);
    font-style: italic;
    font-size: 0.875rem;
}

/* ============ UNILATERAL TRACKING (Slot 3) ============ */
.unilateral-set {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
}

.unilateral-set:last-child {
    border-bottom: none;
}

.unilateral-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.unilateral-side {
    background: var(--color-surface-alt);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.unilateral-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-2);
    text-align: center;
}

.unilateral-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
}

.unilateral-input-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.unilateral-input-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-align: center;
    font-weight: 500;
}

.unilateral-input-group input {
    text-align: center;
    padding: var(--space-2);
    font-size: 1rem;
    width: 100%;
}

/* Mobile - îngustăm spațiul pentru ecrane mici */
@media (max-width: 380px) {
    .unilateral-grid {
        gap: var(--space-2);
    }
    .unilateral-side {
        padding: var(--space-2);
    }
    .unilateral-inputs {
        gap: 4px;
    }
}

/* ============ SUPERSET TRACKING (Slot 6) ============ */
.superset-set {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
}

.superset-set:last-child {
    border-bottom: none;
}

.superset-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-2);
    align-items: stretch;
}

.superset-side {
    background: linear-gradient(to bottom, #fef3c7 0%, #fef9e7 100%);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid #fde68a;
}

.superset-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #92400e;
    text-align: center;
    margin-bottom: var(--space-2);
    line-height: 1.3;
}

.superset-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.2rem;
    font-weight: 600;
    padding: 0 4px;
}

@media (max-width: 480px) {
    .superset-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }
    .superset-arrow {
        transform: rotate(90deg);
        padding: 4px 0;
        font-size: 1rem;
    }
}