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

:root {
    --primary-blue: #007AFF;
    --primary-blue-hover: #0056CC;
    --secondary-gray: #8E8E93;
    --light-gray: #F2F2F7;
    --dark-gray: #1C1C1E;
    --white: #FFFFFF;
    --border-color: #D1D1D6;
    --success-green: #34C759;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #F7F8FC 0%, #EBF0FF 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-gray);
    line-height: 1.5;
}

.container {
    background: var(--white);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: var(--shadow);
    width: 90%;
    max-width: 500px;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.header-section {
    text-align: center;
    margin-bottom: 3rem;
}

.header-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.header-section p {
    font-size: 1.1rem;
    color: var(--secondary-gray);
    font-weight: 400;
}

.section {
    margin-bottom: 2rem;
}

.hidden {
    display: none;
}

.auth-toggle {
    display: flex;
    background: var(--light-gray);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 2rem;
}

.tab-button {
    flex: 1;
    padding: 12px 20px;
    border: none;
    background: transparent;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--secondary-gray);
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-button.active {
    background: var(--white);
    color: var(--dark-gray);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--white);
    transition: all 0.2s ease;
    font-family: inherit;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.primary-button {
    width: 100%;
    background: var(--primary-blue);
    color: var(--white);
    padding: 16px 24px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s ease;
    font-family: inherit;
}

.primary-button:hover:not(:disabled) {
    background: var(--primary-blue-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

.primary-button:disabled {
    background: var(--secondary-gray);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.secondary-button {
    background: transparent;
    color: var(--primary-blue);
    padding: 12px 20px;
    border: 2px solid var(--primary-blue);
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
    font-family: inherit;
}

.secondary-button:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-1px);
}

.dashboard-section {
    max-width: 800px;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark-gray);
}

.dashboard-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 1.5rem;
}

.resume-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.resume-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
}

.resume-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--primary-blue);
}

.resume-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

.resume-card p {
    color: var(--secondary-gray);
    font-size: 0.9rem;
}

.resume-card-content {
    flex: 1;
}

.resume-card-actions {
    margin-left: 1rem;
}

.delete-btn {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    color: var(--secondary-gray);
    opacity: 0.7;
}

.delete-btn:hover {
    background: #ffebee;
    color: #d32f2f;
    opacity: 1;
    transform: scale(1.1);
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark-gray);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
    background: var(--light-gray);
}

.upload-area:hover {
    border-color: var(--primary-blue);
    background: rgba(0, 122, 255, 0.05);
}

.upload-area.dragover {
    border-color: var(--primary-blue);
    background: rgba(0, 122, 255, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upload-area p {
    font-size: 1.1rem;
    color: var(--dark-gray);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.upload-subtitle {
    color: var(--secondary-gray) !important;
    font-size: 0.9rem !important;
    font-weight: 400 !important;
}

.file-info {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: none;
}

.loading-section {
    text-align: center;
    padding: 3rem 2rem;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--light-gray);
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 2rem;
}

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

.loading-section h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

.loading-section p {
    color: var(--secondary-gray);
    font-size: 1.1rem;
}

.result-section {
    text-align: center;
    padding: 2rem;
}

.result-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--success-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 2rem;
    font-weight: bold;
}

.result-section h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

.result-section p {
    color: var(--secondary-gray);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.result-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}


@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 2rem 1.5rem;
    }
    
    .header-section h1 {
        font-size: 2rem;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .resume-cards {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .resume-nav {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-link {
        width: 200px;
        text-align: center;
    }
    
    .resume-name {
        font-size: 2.5rem;
    }
    
    .resume-section {
        padding: 2rem 1.5rem;
    }
}
/* ---------- Demo mode ---------- */
.demo-cta {
    margin-top: 1.5rem;
    text-align: center;
}
.demo-cta__divider {
    position: relative;
    text-align: center;
    margin: 1.25rem 0;
}
.demo-cta__divider::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}
.demo-cta__divider span {
    position: relative;
    background: var(--white);
    padding: 0 0.85rem;
    color: var(--secondary-gray);
    font-size: 0.85rem;
}
.demo-cta__btn {
    width: 100%;
}
.demo-cta__hint {
    margin-top: 0.6rem;
    font-size: 0.82rem;
    color: var(--secondary-gray);
}

.demo-resumes-block {
    margin-bottom: 2.5rem;
}
.demo-resumes-sub {
    color: var(--secondary-gray);
    font-size: 0.9rem;
    margin: -0.25rem 0 1.25rem;
}
.demo-resume-card {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    cursor: default;
}
.demo-resume-card:hover {
    transform: translateY(-2px);
}
.demo-resume-emoji {
    font-size: 2.25rem;
    line-height: 1;
    margin-bottom: 0.65rem;
}
.demo-resume-card .resume-card-content {
    margin-bottom: 1rem;
}
.demo-resume-card .resume-card-actions {
    margin-left: 0;
}
.demo-build-btn {
    width: 100%;
}