:root {
        --white: #ffffff;
        --ink-950: #14173a;
        --ink-900: #1b1f4a;
        --ink-800: #262b63;
        --ink-700: #333a82;
        --ink-accent: #1b1f4a;

        --paper: #f6f4fb;
        --paper-line: #e8e4f5;

        --coral: #ff6a5c;
        --coral-100: #ffe4e0;
        --amber: #ffab3d;
        --amber-100: #fff1dc;
        --mint: #23b391;
        --mint-100: #dcf3ec;
        --slate-100: #ebe9f5;
        --slate-500: #757ba0;
        --muted: #8a8fb3;

        --radius-lg: 20px;
        --radius-md: 16px;
        --radius-sm: 12px;

        --shadow-card: 0 4px 18px rgba(27, 31, 74, 0.07);
        --shadow-pop: 0 8px 24px rgba(27, 31, 74, 0.14);

        --safe-b: env(safe-area-inset-bottom, 0px);
        --safe-t: env(safe-area-inset-top, 0px);
      }

      * {
        box-sizing: border-box;
      }

      html,
      body {
        min-height: 100%;
        background: var(--paper);
        font-family: "Plus Jakarta Sans", sans-serif;
      }

      body {
        min-height: 100vh;
        color: var(--ink-900);
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 20px;
      }

      /* Pola titik halus ala buku catatan bertitik */
      body::before {
        content: "";
        position: fixed;
        inset: 0;
        background-image: radial-gradient(
          circle,
          rgba(27, 31, 74, 0.05) 1px,
          transparent 1px
        );
        background-size: 22px 22px;
        pointer-events: none;
        z-index: 0;
      }

      h1, h2, h3, h4, h5, h6 {
        font-family: "Plus Jakarta Sans", sans-serif;
      }

      /* ---------- LOGIN CARD ---------- */
      .login-wrapper {
        position: relative;
        z-index: 1;
        width: 100%;
        max-width: 420px;
        animation: fadeInUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
      }

      @keyframes fadeInUp {
        from {
          opacity: 0;
          transform: translateY(30px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      /* Logo di atas card — tanpa lingkaran, proporsional */
      .login-logo-top {
        display: flex;
        justify-content: center;
        margin-bottom: 20px;
      }

      .login-logo-top .logo-wrapper {
        max-width: 140px;
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        padding: 4px;
      }

      .login-logo-top .logo-wrapper img {
        width: 100%;
        height: auto;
        max-height: 100px;
        object-fit: contain;
        display: block;
        filter: drop-shadow(0 4px 8px rgba(27, 31, 74, 0.08));
        transition: transform 0.2s ease;
      }

      .login-logo-top .logo-wrapper img:hover {
        transform: scale(1.02);
      }

      .login-card {
        background: #fff;
        border: 1px solid var(--paper-line);
        border-radius: var(--radius-lg);
        padding: 40px 32px 36px;
        box-shadow: var(--shadow-pop);
        position: relative;
        overflow: hidden;
      }

      /* Dekorasi garis atas seperti header */
      .login-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
      }

      /* Header */
      .login-header {
        text-align: center;
        margin-bottom: 32px;
      }

      .login-app-name {
        font-size: 1.6rem;
        font-weight: 700;
        color: var(--ink-900);
        letter-spacing: -0.5px;
        line-height: 1.1;
      }

      .login-app-name span {
        color: var(--ink-700);
      }

      .login-school-name {
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--muted);
        letter-spacing: 0.3px;
        margin-top: 6px;
      }

      .login-divider {
        width: 60px;
        height: 3px;
        background: linear-gradient(90deg, var(--coral), var(--amber));
        border-radius: 999px;
        margin: 12px auto 16px;
      }

      .login-subtitle {
        font-size: 0.9rem;
        color: var(--muted);
        font-weight: 500;
      }

      /* Form */
      .form-group {
        margin-bottom: 20px;
      }

      .form-group label {
        font-weight: 700;
        font-size: 0.8rem;
        color: var(--ink-800);
        letter-spacing: 0.3px;
        margin-bottom: 6px;
        display: block;
      }

      .form-group .input-icon-wrapper {
        position: relative;
      }

      .form-group .input-icon-wrapper .input-icon {
        position: absolute;
        left: 14px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--muted);
        font-size: 1.1rem;
        pointer-events: none;
        transition: color 0.2s ease;
      }

      .form-group .input-icon-wrapper:focus-within .input-icon {
        color: var(--ink-accent);
      }

      .form-control-login {
        width: 100%;
        padding: 12px 16px 12px 46px;
        border: 2px solid var(--paper-line);
        border-radius: var(--radius-sm);
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--ink-900);
        background: var(--paper);
        transition: all 0.25s ease;
        font-family: "Plus Jakarta Sans", sans-serif;
      }

      .form-control-login:focus {
        border-color: var(--ink-accent);
        background: #fff;
        box-shadow: 0 0 0 4px rgba(74, 85, 184, 0.12);
        outline: none;
      }

      .form-control-login::placeholder {
        color: #b5b9d1;
        font-weight: 400;
      }

      .form-control-login.input-error {
        border-color: var(--coral);
        background: var(--coral-100);
        box-shadow: 0 0 0 4px rgba(255, 106, 92, 0.12);
      }

      .error-message {
        font-size: 0.78rem;
        font-weight: 600;
        color: var(--coral);
        margin-top: 6px;
        display: none;
        align-items: center;
        gap: 4px;
      }

      .error-message.show {
        display: flex;
      }

      /* Tombol Login */
      .btn-login {
        width: 100%;
        padding: 14px;
        border: none;
        border-radius: var(--radius-sm);
        background: linear-gradient(135deg, var(--ink-800), var(--ink-700));
        color: #fff;
        font-weight: 700;
        font-size: 1rem;
        letter-spacing: 0.5px;
        transition: all 0.25s ease;
        position: relative;
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        margin-top: 8px;
      }

      .btn-login:hover:not(:disabled) {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(27, 31, 74, 0.3);
      }

      .btn-login:active:not(:disabled) {
        transform: translateY(0);
      }

      .btn-login:disabled {
        opacity: 0.7;
        cursor: not-allowed;
        transform: none;
      }

      .btn-login i {
        font-size: 1.1rem;
        transition: transform 0.3s ease;
      }

      .btn-login:hover:not(:disabled) i {
        transform: translateX(4px);
      }

      .btn-login .spinner {
        display: none;
        width: 20px;
        height: 20px;
        border: 2.5px solid rgba(255, 255, 255, 0.3);
        border-top-color: #fff;
        border-radius: 50%;
        animation: spin 0.7s linear infinite;
      }

      .btn-login.loading .spinner {
        display: inline-block;
      }

      .btn-login.loading .btn-text {
        display: none;
      }

      .btn-login.loading i {
        display: none;
      }

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

      /* Footer login */
      .login-footer {
        text-align: center;
        margin-top: 24px;
        padding-top: 20px;
        border-top: 1px solid var(--paper-line);
      }

      .login-footer .text-muted {
        font-size: 0.75rem;
        color: var(--muted);
        font-weight: 500;
      }

      .login-footer .text-muted i {
        color: var(--coral);
        font-size: 0.65rem;
      }

      /* Info tambahan - versi */
      .version-badge {
        display: inline-block;
        padding: 2px 12px;
        border-radius: 999px;
        background: var(--slate-100);
        color: var(--slate-500);
        font-size: 0.65rem;
        font-weight: 700;
        letter-spacing: 0.3px;
        margin-top: 12px;
      }

      /* Responsive */
      @media (max-width: 480px) {
        .login-card {
          padding: 30px 20px 28px;
        }

        .login-logo-top .logo-wrapper {
          max-width: 110px;
        }

        .login-logo-top .logo-wrapper img {
          max-height: 80px;
        }

        .login-app-name {
          font-size: 1.3rem;
        }

        .form-control-login {
          padding: 10px 14px 10px 42px;
          font-size: 0.9rem;
        }
      }

      @media (prefers-reduced-motion: reduce) {
        .login-wrapper {
          animation: none;
        }
        .btn-login i {
          transition: none;
        }
      }