/**
 * Base Styles - Global Resets, Typography, and Utilities
 * This file contains foundational styles used across the entire application
 */

/* Import CSS Variables */
@import url('variables.css');

/* ========================================
   GLOBAL RESETS
   ======================================== */

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

body {
    font-family: var(--font-primary);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1 {
    font-size: var(--text-3xl);
    font-weight: var(--font-semibold);
}

h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-semibold);
}

h3 {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
}

h4 {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
}

p {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

label {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
}

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

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    font-size: var(--text-sm);
}

.form-group label .required {
    color: var(--danger);
}

.form-group label .optional {
    color: var(--text-secondary);
    font-weight: normal;
    font-size: var(--text-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius-md);
    font-size: var(--text-sm);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    font-family: inherit;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-tertiary);
}

textarea {
    min-height: 120px;
    resize: vertical;
    line-height: var(--leading-relaxed);
}

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

.btn-primary,
.btn-secondary {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--secondary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(34, 197, 94, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled,
.btn-primary.loading {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
    color: var(--text-primary);
}

.btn-text {
    display: inline;
}

.btn-loading {
    display: none;
}

.btn-primary.loading .btn-text,
.btn-secondary.loading .btn-text {
    display: none;
}

.btn-primary.loading .btn-loading,
.btn-secondary.loading .btn-loading {
    display: inline;
}

/* ========================================
   MODAL STYLES
   ======================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-modal);
    opacity: 1;
    transition: all var(--transition-slow);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(1);
    transition: transform var(--transition-slow);
    box-shadow: var(--shadow-xl);
}

.modal.hidden .modal-content {
    transform: scale(0.9);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
}

.close-modal {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-base);
}

.close-modal:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* ========================================
   LOADING & ANIMATIONS
   ======================================== */

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

.spinner {
    width: 36px;
    height: 36px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.spinner-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner-container {
    text-align: center;
    color: white;
}

.spinner-text {
    margin-top: 16px;
    font-size: 16px;
    color: white;
    font-weight: 500;
}

/* ========================================
   ALERTS & MESSAGES
   ======================================== */

.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--danger);
    padding: 12px 16px;
    border-radius: var(--border-radius-md);
    font-size: var(--text-sm);
    margin-top: var(--spacing-md);
}

.error-message.hidden {
    display: none;
}

.success-message {
    background: #dcfce7;
    border: 1px solid #bbf7d0;
    color: #166534;
    padding: 12px 16px;
    border-radius: var(--border-radius-md);
    font-size: var(--text-sm);
    margin-top: var(--spacing-md);
}

.success-message.hidden {
    display: none;
}

/* ========================================
   SCROLLBAR STYLES
   ======================================== */

*::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

*::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

*::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 4px;
}

*::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ========================================
   RESPONSIVE UTILITIES
   ======================================== */

@media (max-width: 768px) {
    h1 {
        font-size: var(--text-2xl);
    }

    h2 {
        font-size: var(--text-xl);
    }

    h3 {
        font-size: var(--text-lg);
    }

    .modal-content {
        width: 95%;
        margin: 20px;
    }

    .modal-body {
        padding: var(--spacing-lg);
    }

    .modal-actions {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}