/**
 * Premium Delivery Tracking System
 * Apple/Tesla-inspired Minimalist Design
 */

/* ===== CSS VARIABLES ===== */
:root {
    /* Color Palette - True Premium */
    --color-primary: #000000;
    --color-secondary: #ffffff;
    --color-accent: #007AFF;
    --color-accent-hover: #0056CC;
    --color-surface: #f8f9fa;
    --color-border: #d1d1d1;
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-text-muted: #6e6e73;
    --color-error: #FF3B30;
    --color-success: #34C759;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

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

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

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: #f5f5f7;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== PAGE LAYOUT ===== */
.page-container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.main-content {
    width: 100%;
    max-width: 480px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

/* ===== LOGO SECTION ===== */
.logo-section {
    text-align: center;
}

.logo-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-md);
    justify-content: center;
}

.logo {
    width: 80px;
    height: 80px;
    color: var(--color-primary);
    transition: transform var(--transition-normal);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.brand-name {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xs);
}

.brand-tagline {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    letter-spacing: 0.02em;
}

/* ===== AUTH SECTION ===== */
.auth-section {
    width: 100%;
}

.auth-container {
    background: var(--color-secondary);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--color-border);
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.login-form {
    padding: var(--spacing-2xl);
}

.form-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.form-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.form-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-normal);
}

.form-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    letter-spacing: 0.01em;
}

.input-container {
    position: relative;
    display: flex;
    align-items: center;
}

.form-input {
    width: 100%;
    height: 48px;
    padding: 0 16px 0 48px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--color-surface);
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
}

.form-input::placeholder {
    color: var(--color-text-secondary);
    opacity: 1;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.input-icon {
    position: absolute;
    left: 16px;
    color: var(--color-text-secondary);
    pointer-events: none;
    transition: color var(--transition-normal);
}

.form-input:focus + .input-icon {
    color: var(--color-accent);
}

/* ===== BUTTONS ===== */
.submit-btn {
    position: relative;
    width: 100%;
    height: 48px;
    background: var(--color-accent);
    color: var(--color-secondary);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.submit-btn:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.4);
}

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

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-text {
    transition: opacity var(--transition-fast);
}

.btn-loader {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border-radius: var(--radius-md);
}

.loader {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-secondary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== TRACK SECTION ===== */
.track-section {
    width: 100%;
}

.track-container {
    position: relative;
    height: 48px;
}

.track-btn {
    width: 100%;
    height: 100%;
    background: var(--color-secondary);
    color: var(--color-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.track-btn:hover {
    background: var(--color-secondary);
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.track-form {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transform: rotateY(90deg);
    transform-origin: center;
    transition: all var(--transition-slow);
    pointer-events: none;
}

.track-form.active {
    opacity: 1;
    transform: rotateY(0deg);
    pointer-events: all;
}

.track-input-container {
    width: 100%;
}

.track-input {
    width: 100%;
    height: 48px;
    padding: 0 48px 0 16px;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: var(--font-family);
    background: var(--color-secondary);
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
}

.track-input::placeholder {
    color: var(--color-text-secondary);
    opacity: 1;
}

.track-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.track-submit-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background: var(--color-accent);
    color: var(--color-secondary);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.track-submit-btn:hover {
    background: var(--color-accent-hover);
    transform: translateY(-50%) scale(1.05);
}

.track-cancel-btn {
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    font-family: var(--font-family);
    cursor: pointer;
    transition: color var(--transition-normal);
    text-decoration: underline;
}

.track-cancel-btn:hover {
    color: var(--color-text-primary);
}

/* ===== FORM FOOTER ===== */
.form-footer {
    margin-top: var(--spacing-lg);
    text-align: center;
}

.forgot-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-normal);
}

.forgot-link:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

/* ===== ERROR MESSAGE ===== */
.error-message {
    padding: 12px 16px;
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.2);
    border-radius: var(--radius-md);
    color: var(--color-error);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    text-align: center;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .page-container {
        padding: var(--spacing-lg);
    }
    
    .main-content {
        max-width: 100%;
        gap: var(--spacing-xl);
    }
    
    .login-form {
        padding: var(--spacing-xl);
    }
    
    .brand-name {
        font-size: 1.75rem;
    }
    
    .form-title {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .page-container {
        padding: var(--spacing-md);
    }
    
    .main-content {
        max-width: 100%;
        gap: var(--spacing-lg);
    }
    
    .login-form {
        padding: var(--spacing-lg);
    }
    
    .brand-name {
        font-size: 1.5rem;
    }
    
    .form-title {
        font-size: 1.125rem;
    }
}

/* ===== DESKTOP OPTIMIZATION ===== */
@media (min-width: 769px) {
    .page-container {
        padding: var(--spacing-2xl);
    }
    
    .main-content {
        max-width: 420px;
    }
    
    .auth-container {
        box-shadow: var(--shadow-xl);
    }
    
    .track-btn:hover {
        transform: translateY(-2px);
    }
}

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

/* Focus styles for keyboard navigation */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}