/* GENERAL STYLING */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f7fc;
    color: #172554;
    font-size: 18px;
    line-height: 1.6;
}

/* NAVIGATION */

.navbar {
    background: #101b3b;
    color: white;
    padding: 18px 8%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: bold;
}

.logo-icon {
    background: #6c63ff;
    padding: 5px 12px;
    border-radius: 8px;
}

.navbar nav {
    display: flex;
    gap: 28px;
}

.navbar nav a {
    text-decoration: none;
    color: #dbeafe;
    font-size: 16px;
    transition: 0.3s;
}

.navbar nav a:hover {
    color: #a5b4fc;
}

/* HERO SECTION */

.hero {
    background: linear-gradient(120deg, #101b3b, #263b79, #5145a9);
    color: white;
    padding: 85px 10%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    min-height: 400px;
}

.hero-content {
    max-width: 650px;
}

.category,
.small-heading {
    color: #818cf8;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 2px;
}

.hero h1 {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    line-height: 1.2;
    margin: 20px 0;
}

.hero h1 span {
    color: #a5b4fc;
}

.hero-content p {
    color: #dbeafe;
    margin-bottom: 30px;
    max-width: 520px;
}

.hero-button {
    display: inline-block;
    background: #7c70ff;
    color: white;
    padding: 13px 25px;
    border-radius: 7px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

.hero-button:hover {
    background: #6555e8;
    transform: translateY(-2px);
}

.hero-decoration {
    text-align: center;
    min-width: 180px;
}

.screen-icon {
    width: 145px;
    height: 120px;
    border: 5px solid #a5b4fc;
    border-radius: 15px;
    display: grid;
    place-items: center;
    margin: auto auto 15px;
    font-size: 65px;
    color: #a5b4fc;
}

/* SECTION HEADINGS */

.tutorial-section,
.steps-section,
.transcript-section {
    padding: 65px 8%;
}

.section-heading {
    text-align: center;
    margin-bottom: 30px;
}

.section-heading h2 {
    font-size: clamp(1.8rem, 3vw, 2.25rem);
    margin: 10px 0;
    color: #172554;
}

.section-heading p {
    color: #64748b;
}

/* VIDEO */

.video-card {
    max-width: 1100px;
    margin: auto;
    background: white;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
}

.video-container {
    background: #080d1b;
    width: 100%;
}

.video-container video {
    display: block;
    width: 100%;
    max-height: 620px;
    aspect-ratio: 16 / 9;
    object-fit: contain;
}

/* CUSTOM CONTROLS */

.video-controls {
    padding: 22px;
}

.control-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.control-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 7px;
    color: white;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: 0.3s;
}

.play {
    background: #16a34a;
}

.pause {
    background: #ea8b20;
}

.restart {
    background: #6555e8;
}

.control-btn:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

.status-box {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    padding: 12px;
    background: #f1f5f9;
    border-radius: 7px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #16a34a;
}

.status-box p {
    color: #334155;
    font-size: 16px;
}

/* LEARNING STEPS */

.steps-section {
    background: #edf0ff;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1100px;
    margin: auto;
}

.step-card {
    background: white;
    padding: 25px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    transition: 0.3s;
}

.step-card:hover {
    transform: translateY(-5px);
}

.step-card span {
    color: #6555e8;
    font-size: 25px;
    font-weight: bold;
}

.step-card h3 {
    font-size: 19px;
    margin: 12px 0;
}

.step-card p {
    font-size: 16px;
    color: #64748b;
}

/* TRANSCRIPT */

.transcript-card {
    background: white;
    max-width: 850px;
    margin: auto;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.transcript-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e2e8f0;
}

.transcript-header span {
    background: #ede9fe;
    color: #6555e8;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 14px;
}

.transcript-content p {
    margin-bottom: 18px;
    color: #475569;
    font-size: 17px;
}

.transcript-content strong {
    color: #172554;
}

/* FOOTER */

.footer {
    background: #101b3b;
    color: white;
    padding: 35px 20px;
    text-align: center;
}

.footer-logo {
    font-size: 23px;
    font-weight: bold;
    margin-bottom: 8px;
}

.footer p {
    color: #cbd5e1;
    font-size: 16px;
}

.copyright {
    margin-top: 18px;
    font-size: 14px !important;
}

/* RESPONSIVE DESIGN */

@media (max-width: 850px) {

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 600px) {

    .navbar {
        flex-direction: column;
        gap: 15px;
        padding: 18px;
    }

    .navbar nav {
        gap: 18px;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 60px 7%;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-decoration {
        margin-top: 15px;
    }

    .tutorial-section,
    .steps-section,
    .transcript-section {
        padding: 45px 5%;
    }

    .section-heading h2 {
        font-size: 1.75rem;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }

    .control-buttons {
        flex-direction: column;
    }

    .control-btn {
        width: 100%;
    }

    .transcript-card {
        padding: 18px;
    }
}