/* ================================================
   MODERN VISION TRIP MANAGEMENT INTERFACE STYLES
   ================================================ */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --success-hover: #059669;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Typography Override */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    background-color: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
}

/* ================================================
   MODERN CONTAINER & LAYOUT
   ================================================ */

.modern-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: calc(100vh - 80px);
}

/* ================================================
   PAGE HEADER STYLES
   ================================================ */

.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    margin-bottom: 2rem;
    color: white;
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition);
    width: fit-content;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.back-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-2px);
}

.page-title h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.025em;
}

.page-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin: 0.5rem 0 0 0;
    font-weight: 400;
}

/* ================================================
   FORM CARD STYLES
   ================================================ */

.vision-trip-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-card {
    background: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: var(--transition);
}

.form-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--gray-300);
}

.card-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.card-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.card-title svg {
    color: var(--primary-color);
    flex-shrink: 0;
}

.card-description {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin: 0;
    line-height: 1.5;
}

.card-content {
    padding: 2rem;
}

/* ================================================
   FORM ELEMENTS
   ================================================ */

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--gray-700);
    margin-bottom: 0.25rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    transition: var(--transition);
    background: white;
    box-sizing: border-box;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-input:disabled,
.form-textarea:disabled {
    background-color: var(--gray-100);
    color: var(--gray-500);
    cursor: not-allowed;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--gray-400);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ================================================
   LEADERS SECTION STYLES
   ================================================ */

.leaders-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--gray-50);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-200);
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.btn-add-leader {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-add-leader:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-add-leader:disabled {
    background: var(--gray-300);
    color: var(--gray-500);
    cursor: not-allowed;
    transform: none;
}

.leaders-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.leaders-container:empty::before {
    content: "No leaders added yet. Click 'Add Leader' to get started.";
    display: block;
    padding: 2rem;
    text-align: center;
    color: var(--gray-400);
    font-style: italic;
    background: var(--gray-50);
    border-radius: var(--border-radius);
    border: 2px dashed var(--gray-300);
}

.leader-item {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--gray-50);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    animation: slideInUp 0.3s ease-out;
}

.leader-item:hover {
    border-color: var(--gray-300);
    background: white;
}

.leader-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.leader-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    margin: 0;
}

.remove-leader-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.remove-leader-btn:hover {
    background: var(--danger-hover);
    transform: scale(1.05);
}

.remove-leader-btn:disabled {
    background: var(--gray-300);
    color: var(--gray-500);
    cursor: not-allowed;
    transform: none;
}

.leader-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.leader-fields .form-group {
    margin-bottom: 0;
}

.leader-fields .form-input {
    background: white;
    border-color: var(--gray-300);
}

.leader-fields .form-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* ================================================
   ACTION BUTTONS
   ================================================ */

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    padding: 2rem 0;
    margin-top: 1rem;
}

.btn-primary,
.btn-success {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background: var(--success-hover);
    transform: translateY(-1px);
}

.btn-primary:disabled,
.btn-success:disabled {
    background: var(--gray-300);
    color: var(--gray-500);
    cursor: not-allowed;
    transform: none;
}

/* ================================================
   ANIMATIONS
   ================================================ */

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* ================================================
   RESPONSIVE DESIGN
   ================================================ */

@media (max-width: 768px) {
    .modern-container {
        padding: 1rem;
    }

    .page-header {
        padding: 1.5rem;
    }

    .page-title h1 {
        font-size: 2rem;
    }

    .card-content {
        padding: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .leader-fields {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .form-actions {
        flex-direction: column;
        gap: 0.75rem;
    }

    .btn-primary,
    .btn-success {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .page-title h1 {
        font-size: 1.75rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .card-content {
        padding: 1rem;
    }

    .leader-item {
        padding: 1rem;
    }
}

/* ================================================
   ACCESSIBILITY & REDUCED MOTION
   ================================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.btn-primary:focus,
.btn-success:focus,
.btn-add-leader:focus,
.remove-leader-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ================================================
   HIGH CONTRAST MODE
   ================================================ */

@media (prefers-contrast: high) {
    :root {
        --gray-200: #000;
        --gray-300: #000;
        --shadow: 0 2px 4px 0 rgb(0 0 0 / 0.3);
        --shadow-md: 0 4px 8px 0 rgb(0 0 0 / 0.3);
    }
}