/* ==========================================================================
   Luis Cabrera Portfolio — Styles
   ========================================================================== */

/* Custom Properties */
:root {
    /* Background */
    --color-bg: #f8f7f4;
    --color-white: #fff;

    /* Grays */
    --color-gray-light: #e8e6e3;
    --color-gray-mid: #d4d2cf;
    --color-gray-dark: #a8a6a3;

    /* Text Hierarchy */
    --color-text: #2d2d2d;          /* Primary: titles, important */
    --color-text-muted: #555;        /* Secondary: body, descriptions */
    --color-text-subtle: #888;       /* Tertiary: meta, dates */

    /* Feedback */
    --color-error: #c53030;
    --color-success: #276749;

    /* Glass Effect */
    --color-glass-bg: rgba(255, 255, 255, 0.7);
    --color-glass-border: rgba(255, 255, 255, 0.4);

    /* Shadows */
    --shadow-soft: 0 4px 30px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.06);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ==========================================================================
   Intro Screen
   ========================================================================== */

.intro {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 1.2s ease-out;
}

.intro.hide {
    opacity: 0;
    pointer-events: none;
}

.intro.done {
    display: none;
}

.intro-content {
    text-align: center;
    overflow: hidden;
}

.intro-greeting {
    display: inline-block;
    font-size: clamp(4rem, 15vw, 10rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-text);
    opacity: 0;
    transform: translateY(100%);
    animation: greetingIn 0.5s ease forwards;
}

.intro-greeting.out {
    animation: greetingOut 0.4s ease forwards;
}

@keyframes greetingIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes greetingOut {
    to {
        opacity: 0;
        transform: translateY(-100%);
    }
}

/* ==========================================================================
   Animated Flowing Lines Background
   ========================================================================== */

.background-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* Topographic contour lines */
.flow-line {
    fill: none;
    stroke: var(--color-gray-mid);
    stroke-width: 1.5;
    stroke-linecap: round;
    opacity: 0.4;
    transition: opacity 0.4s ease, stroke-width 0.4s ease;
}

/* Group animations - each group moves independently */
.topo-group {
    transition: transform 0.3s ease-out;
}

.topo-group-1 {
    animation: drift1 20s ease-in-out infinite;
}

.topo-group-2 {
    animation: drift2 25s ease-in-out infinite;
}

.topo-group-3 {
    animation: drift3 22s ease-in-out infinite;
}

.topo-group-4 {
    animation: drift4 28s ease-in-out infinite;
}

.topo-group-5 {
    animation: drift5 24s ease-in-out infinite;
}

.topo-group-6 {
    animation: drift6 26s ease-in-out infinite;
}

/* Individual line variations within groups */
.line-1, .line-4, .line-7, .line-10, .line-13, .line-16 {
    stroke-width: 1.8;
    opacity: 0.5;
}

.line-2, .line-5, .line-8, .line-11, .line-14, .line-17 {
    stroke-width: 1.4;
    opacity: 0.35;
}

.line-3, .line-6, .line-9, .line-12, .line-15, .line-18 {
    stroke-width: 1;
    opacity: 0.25;
}

/* Drift animations - subtle organic movement */
@keyframes drift1 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(15px, 8px); }
    50% { transform: translate(-10px, 15px); }
    75% { transform: translate(8px, -5px); }
}

@keyframes drift2 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-12px, 10px); }
    50% { transform: translate(18px, -8px); }
    75% { transform: translate(-5px, 12px); }
}

@keyframes drift3 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(10px, -12px); }
    50% { transform: translate(-15px, 5px); }
    75% { transform: translate(12px, 10px); }
}

@keyframes drift4 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-8px, 15px); }
    50% { transform: translate(12px, -10px); }
    75% { transform: translate(-10px, -8px); }
}

@keyframes drift5 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(18px, -5px); }
    50% { transform: translate(-8px, 12px); }
    75% { transform: translate(5px, -15px); }
}

@keyframes drift6 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-15px, -10px); }
    50% { transform: translate(10px, 18px); }
    75% { transform: translate(-12px, 5px); }
}

/* Hover interaction styles - applied via JS */
.background-lines.interactive .topo-group {
    transition: transform 0.15s ease-out;
}

.flow-line.highlighted {
    opacity: 0.7;
    stroke-width: 2.5;
}

/* ==========================================================================
   Layout
   ========================================================================== */

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 60px 0;
}

/* ==========================================================================
   Typography — Consistent Scale
   ========================================================================== */

/*
   Type Scale:
   - Section titles: 1.75rem / 700
   - Primary titles (roles, project names): 1.125rem / 600
   - Secondary titles (companies, schools): 0.9rem / 500
   - Body text: 1rem / 400
   - Meta text (dates, locations): 0.85rem / 400
   - Small text (pills, badges): 0.8rem / 500
*/

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 32px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 120px 0 40px;
}

.hero-name {
    font-size: clamp(3rem, 10vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 8px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.4s ease-out, transform 1.4s ease-out;
}

.hero-tagline {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 400;
    color: var(--color-text-muted);
    margin-bottom: 32px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.2s ease-out 0.3s, transform 1.2s ease-out 0.3s;
}

.hero-links {
    display: flex;
    gap: 16px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease-out 0.5s, transform 1s ease-out 0.5s;
}

.hero.revealed .hero-name,
.hero.revealed .hero-tagline,
.hero.revealed .hero-links {
    opacity: 1;
    transform: translateY(0);
}

.hero-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    color: var(--color-text);
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.hero-link:hover {
    transform: translateY(-2px);
    background: var(--color-white);
}

.hero-icon {
    width: 20px;
    height: 20px;
}

/* ==========================================================================
   Glass Cards
   ========================================================================== */

.glass-card {
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
}

.about-text strong {
    font-weight: 600;
}

/* ==========================================================================
   Projects Section
   ========================================================================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    display: flex;
    flex-direction: column;
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.project-name {
    font-size: 1.125rem;
    font-weight: 600;
}

.project-status {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 4px 10px;
    background: var(--color-text);
    color: var(--color-white);
    border-radius: 100px;
}

.project-status.status-alpha {
    background: var(--color-gray-dark);
}

.project-desc {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-pill {
    font-size: 0.8rem;
    font-weight: 500;
    padding: 4px 12px;
    background: var(--color-bg);
    border-radius: 100px;
    color: var(--color-text-subtle);
}

/* ==========================================================================
   Skills Section
   ========================================================================== */

.skills-grid {
    display: grid;
    gap: 20px;
}

.skill-card {
    padding: 24px;
}

.skill-category {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-pill {
    font-size: 0.8rem;
    font-weight: 400;
    padding: 6px 14px;
    background: rgba(45, 45, 45, 0.05);
    border-radius: 100px;
    color: var(--color-text);
    transition: background var(--transition-fast);
}

.skill-pill:hover {
    background: rgba(45, 45, 45, 0.1);
}

/* ==========================================================================
   Experience Section — Timeline Design
   ========================================================================== */

.experience-list {
    position: relative;
    display: flex;
    flex-direction: column;
    margin-left: 24px;
    padding-left: 32px;
    border-left: 2px solid var(--color-gray-light);
}

/* Gradient overlay on the timeline border */
.experience-list::before {
    content: '';
    position: absolute;
    left: -2px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(
        180deg,
        var(--color-text) 0%,
        var(--color-gray-mid) 30%,
        var(--color-gray-light) 100%
    );
    border-radius: 2px;
}

.experience-card {
    position: relative;
    padding: 24px 0;
    border-bottom: 1px solid var(--color-gray-light);
    transition: background var(--transition-fast);
}

.experience-card:last-child {
    border-bottom: none;
}

/* Timeline dot */
.experience-card::before {
    content: '';
    position: absolute;
    left: -41px;
    top: 32px;
    width: 16px;
    height: 16px;
    background: var(--color-bg);
    border: 3px solid var(--color-gray-mid);
    border-radius: 50%;
    transition: all var(--transition-fast);
    z-index: 1;
}

/* Current/active job — filled dot with glow */
.experience-card:first-child::before {
    border-color: var(--color-text);
    background: var(--color-text);
    box-shadow: 0 0 0 5px rgba(45, 45, 45, 0.12);
}

/* Hover effect on dots */
.experience-card:hover::before {
    border-color: var(--color-text);
    transform: scale(1.15);
}

.experience-header {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 16px;
}

.company-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    background: var(--color-glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
    box-shadow: var(--shadow-soft);
}

.company-icon svg {
    width: 22px;
    height: 22px;
    color: var(--color-text-muted);
}

/* Company icon with image */
.company-icon-img {
    padding: 0;
    overflow: hidden;
}

.company-icon-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.company-info {
    flex: 1;
    min-width: 0;
}

.company-name-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 4px;
}

.exp-company-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
    line-height: 1.3;
}

.current-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 4px 10px;
    background: var(--color-text);
    color: var(--color-white);
    border-radius: 100px;
}

.exp-job-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
    margin: 0 0 10px;
}

.exp-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--color-text-subtle);
}

.exp-location,
.exp-dates {
    display: flex;
    align-items: center;
    gap: 6px;
}

.exp-location svg,
.exp-dates svg {
    opacity: 0.6;
    flex-shrink: 0;
}

.experience-bullets {
    list-style: none;
    padding: 0;
    margin: 0 0 0 68px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.experience-bullets li {
    position: relative;
    padding-left: 18px;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.55;
}

/* Custom bullet points */
.experience-bullets li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 5px;
    height: 5px;
    background: var(--color-gray-mid);
    border-radius: 50%;
}

/* ==========================================================================
   Highlights Section
   ========================================================================== */

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.highlight-card {
    text-align: center;
    padding: 32px 24px;
}

.highlight-metric {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.highlight-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Education Section
   ========================================================================== */

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.education-card {
    padding: 28px;
}

.school-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.degree {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.edu-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--color-text-subtle);
}

.gpa {
    font-weight: 500;
    color: var(--color-text);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact-card {
    max-width: 500px;
}

.contact-card:hover {
    transform: none;
}

.contact-intro {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

.cv-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-group {
    display: flex;
    gap: 12px;
}

.form-input {
    flex: 1;
    padding: 14px 18px;
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-white);
    border: 1px solid var(--color-gray-mid);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder {
    color: var(--color-gray-dark);
}

.form-input:focus {
    border-color: var(--color-text);
    box-shadow: 0 0 0 3px rgba(45, 45, 45, 0.1);
}

.form-input.error {
    border-color: var(--color-error);
}

.form-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-text);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
    min-width: 140px;
}

.form-submit:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-1px);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-submit.loading .btn-text {
    display: none;
}

.form-submit.loading .btn-loading {
    display: flex;
}

.btn-loading {
    display: none;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

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

.form-error {
    font-size: 0.85rem;
    color: var(--color-error);
    min-height: 20px;
}

.form-success {
    font-size: 0.85rem;
    color: var(--color-success);
    min-height: 20px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    padding: 60px 24px 40px;
    margin-top: 20px;
}

.footer-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--color-text-subtle);
}


/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
    main {
        padding: 0 20px;
    }

    .section {
        padding: 48px 0;
    }

    .hero {
        min-height: 70vh;
        padding: 80px 0 60px;
    }

    .glass-card {
        padding: 24px;
        border-radius: var(--radius-md);
    }

    /* Timeline adjustments for mobile */
    .experience-list {
        margin-left: 16px;
        padding-left: 24px;
    }

    .experience-card::before {
        left: -33px;
        width: 12px;
        height: 12px;
        top: 28px;
    }

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .company-icon {
        width: 44px;
        height: 44px;
        min-width: 44px;
    }

    .experience-bullets {
        margin-left: 0;
        margin-top: 12px;
    }

    .exp-meta {
        flex-direction: column;
        gap: 6px;
    }

    .form-group {
        flex-direction: column;
    }

    .form-submit {
        width: 100%;
    }

    .flow-line {
        stroke-width: 1;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2.5rem;
    }

    .projects-grid,
    .education-grid,
    .highlights-grid {
        grid-template-columns: 1fr;
    }

    .skill-pills {
        gap: 6px;
    }

    .skill-pill {
        font-size: 0.75rem;
        padding: 5px 10px;
    }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

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

    html {
        scroll-behavior: auto;
    }

    .flow-line {
        animation: none;
        stroke-dashoffset: 0;
    }

    .section,
    .glass-card,
    .experience-card,
    .section-title,
    .footer {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .background-lines,
    .intro {
        display: none;
    }

    .glass-card,
    .experience-card {
        background: var(--color-white);
        box-shadow: none;
        border: 1px solid var(--color-gray-light);
    }

    .section,
    .glass-card,
    .experience-card,
    .section-title,
    .footer {
        opacity: 1 !important;
        transform: none !important;
    }
}